Tours and Tickets
Yosemite National Park and Giant Sequoias Day Trip from San Francisco
4.5

Yosemite National Park and Giant Sequoias Day Trip from San Francisco

By Extranomical Tours
Don’t let time constraints keep you from making the trip to Yosemite National Park from San Francisco. A day trip lets you visit the park’s major attractions such as Half Dome, Tuolumne Grove, and El Capitan—and still make it back to the city in time for dinner.
from
C$271.49
per adult (price varies by group size)
from
C$271.49
per adult (price varies by group size)

Lowest price guaranteeReserve now & pay laterFree cancellation

Ages 0-99, max of 41 per group
Duration: 14–15 hours
Start time: Check availability
Mobile ticket
German, Chinese, Korean, Portuguese, Japanese, English, Italian, French, Spanish

Highlights
  • Travel round trip from San Francisco to Yosemite in a single day
  • See the park’s most famous attractions, Half Dome and El Capitan
  • Enjoy free time to explore Yosemite Valley on your own
  • Ride through historic gold mining towns and into the Sierra Nevada mountains
  • Guided commentary helps the long bus ride fly by

  • Expert guide and commentary
  • Hotel pickup and drop-off (most hotels in downtown San Francisco/Fisherman's Wharf area, but do not pick up outside SF city limits)
  • Guide Gratuities (for Private option ONLY)
  • Entry/Admission - Yosemite Valley
  • Entry/Admission - Tuolumne Grove of Giant Sequoias
  • Entry/Admission - Tunnel View
  • Entry/Admission - El Capitan
What's not included
  • Guide Gratuities (for Shared tour)
  • Child safety seat for children under 8 years old or 4' 9" (1.4 meters) required
  • Food and drinks, unless specified

Begin your day with pickup from your select San Francisco hotel or central meeting point. Head out of the city and through historic Gold Rush towns en route to the Sierra Nevada—commentary from your guide makes the drive fly by. Upon arrival, take a hike past some of the oldest and largest redwood trees in the world at Tuolumne Grove (weather permitting). Snap a photo inside a tunneled-out tree, or see how many people it takes to wrap arms around a trunk. Continue on to Tunnel View for an unbeatable view of Yosemite Valley. Look out for expert rock climbers scaling the world-class cliffs of Half Dome and El Capitan, and in the springtime, see the 2,400 foot-tall (740 meter) cascade of Yosemite Falls. Spend time dining or exploring the park on your own before reconvening with your guide for the return to San Francisco. Please note: Some itinerary items are weather dependent, and itinerary may be adapted to make the most of Yosemite during different seasons. The giant sequoias are best visited between May and October, as winter ice and snow may prevent access during the rest of the year.

Departure details
  • Traveller pickup is offered.
  • For Hilton Union Square - meet at the Mason street entrance (Eastern entrance). For other locations, please meet outside hotel main doors. If your hotel is not listed, please select Hilton Union Square or Hotel Zephyr Fisherman's Wharf or alternatively add your hotel and we will provide the closest pick-up location. You will be provided your exact pick-up location and time upon confirmation. Please always refer to the providers confirmation.
  • Hilton San Francisco Union Square, 333 O'Farrell St, San Francisco, CA 94102, USA Meet at the Mason street entrance (Eastern entrance). Please check your email confirmation from Extranomical Tours or contact the provider to confirm your pick-up details and time
  • Hotel pickup is offered. View the hotel list on our checkout page to see if yours is included among the pickup points.
Return details
  • Returns to original departure point

  • Wheelchair accessible
  • Stroller accessible
  • Service animals allowed
  • Near public transportation
If you have questions about accessibility, we’d be happy to help. Just call the number below and reference the product code: 2402YNP

  • Confirmation will be received at time of booking
  • Access to the Sequoia Grove can be difficult during winter months, generally October through April, and other activities may be substituted at the discretion of the guide
  • During winter months, temperatures in Yosemite can vary drastically to the ones in San Francisco. Therefore, it is recommend to wear winter clothes, especially shoes or boots with rubber soles and treads
  • California law requires tour guests to bring a car safety seat for all children under 8 years and under 4' 9" (1.4 meters) in height. Any guest that does not provide their child's safety seat at the time of the tour and does not inform the tour operator may not be allowed to board the tour and will not be subject to refund.
  • As tour sizes vary, transportation is in a 13-passenger van or up to a 41-passenger tour bus
  • Tour makes stops at approximately 8:30am for breakfast, 1pm for lunch and on the trip back for dinner. Meals are not included
  • Audio links are available in Spanish, Portuguese, Italian, French, German, Korean, Chinese and Japanese. Specify language at time of booking under special requirements.
  • For hotel pickups, please select the Hilton Union Square if your hotel is not listed
  • The Giant Sequoias Grove is located at a higher elevation and the hike is dependent on trail conditions, especially from October through May. Ice and snow might make the trail unsafe to hike. The decision of whether it is safe to go on the hike will be made on a day by day basis. Therefore, a visit cannot be guaranteed. However, while the trail might be closed, guests get to spend more time in Yosemite Valley. There you can see all the other great sights Yosemite has to offer, including El Capitan, Inspiration Point, Half Dome, Yosemite Falls and more.
  • Exact destinations & itinerary may differ due to weather, road conditions, and your guide's discretion.
  • For Private Tour option, size of vehicle will be dependent on size of your party
  • Travellers should have a moderate physical fitness level
  • This experience requires good weather. If it’s cancelled due to poor weather, you’ll be offered a different date or a full refund
  • This experience requires a minimum number of travellers. If it’s cancelled because the minimum isn’t met, you’ll be offered a different date/experience or a full refund
  • This tour/activity will have a maximum of 41 travellers

  • For a full refund, cancel at least 24 hours in advance of the start date of the experience.

Which attractions will I visit with Yosemite National Park and Giant Sequoias Day Trip from San Francisco?
How much is Yosemite National Park and Giant Sequoias Day Trip from San Francisco?
Yosemite National Park and Giant Sequoias Day Trip from San Francisco price starts from C$264.90. Discover and book Yosemite National Park and Giant Sequoias Day Trip from San Francisco on Tripadvisor
What is the Yosemite National Park and Giant Sequoias Day Trip from San Francisco cancellation policy?
Yosemite National Park and Giant Sequoias Day Trip from San Francisco cancellation policy: For a full refund, cancel at least 24 hours in advance of the start date of the experience. Discover and book Yosemite National Park and Giant Sequoias Day Trip from San Francisco on Tripadvisor
Which company provides Yosemite National Park and Giant Sequoias Day Trip from San Francisco?
Yosemite National Park and Giant Sequoias Day Trip from San Francisco is hosted by Extranomical Tours. Read reviews, discover additonal experiences or contact Extranomical Tours on Tripadvisor. Discover and book Yosemite National Park and Giant Sequoias Day Trip from San Francisco on Tripadvisor

If you have questions about this tour or need help making your booking, we’d be happy to help. Just call the number below and reference the product code: 2402YNP

Itinerary
  • You'll start at
    Hilton San Francisco Union Square
    Or, you can also get picked up
    See departure details
  • Pass by
    San Francisco Bay Bridge
    Sierra Nevada
    Big Oak Flat Information Station
  • 1
    Yosemite Valley
    Stop: 5 hours - Admission included
    See details
  • 2
    Tuolumne Grove of Giant Sequoias
    Stop: 60 minutes - Admission included
    See details
  • 3
    Tunnel View
    Stop: 15 minutes - Admission included
    See details
    Pass by
    Ansel Adams Gallery
    Bridalveil Falls
  • 4
    El Capitan
    Stop: 15 minutes - Admission included
    See details
    Pass by
    Half Dome
  • 5
    Lower Yosemite Fall Trail
    Stop: 20 minutes
    See details
  • 6
    Yosemite Falls
    Stop: 60 minutes
    See details
    Pass by
    Yosemite Valley Lodge
    Valley Visitor Center
    Treasure Island
  • You'll return to the starting point
+
About the operator

Don’t take it from us – here’s what people have to say about this operator.

Pauline B
Pauline B
00
A beautiful day in Muir Woods and Napa and Sonoma Wineries
It was a fantastic tour with a great driver, Kimmy. We first went to Muir Wood and spent a little more than an hou
Nancy K
Nancy K
00
A must do!
Our driver and guide, Dan, was very informative. I really enjoyed Muir Woods. It was just enough time to explore a
ambitioustotravel
ambitioustotravel
00
An amazing day trip with Don!
An amazing day exploring the Munir Woods, Sonoma and the Napa wine region. Huge thanks to our tour guide Don who sh
TravJRyan
TravJRyan
00
Muir Woods and Sonoma/Napa Wine Tour
This was a great way to spend our extra day in SF following a 3 day conference. Our driver/guide/host Ben was very
Jessica L
Jessica L
00
Fun day in Muir Woods and Wineries
My husband and I loved our tour of the Muir Woods, Napa, and Sonoma. Our guide Doug was fabulous! He gave us a grea
U1398HPwilliamb
U1398HPwilliamb
00
Nice place
Nice place wad very happy to visit and will come back again to visit also nice people good shopping we loved it
calebv480
calebv480
00
Fantastic day out with Rob!
What an amazing day! Despite the weather being a little gloomy and wet we had the most fantastic trip to Yosemite.
talissar2023
talissar2023
00
Must do experience for short stays
Our tour guide Rob, was super accomodating, full of energy and happy personality. More importantly knowledgeable to
ireneli2022
ireneli2022
00
Great and Efficient way to get an overview of Yosemite
Even in a relatively bad weather, I still got good pictures. It is THAT beautiful. The tour itself is well arranged
HankW507
HankW507
00
Muir Woods and Wine Country Tour.
Alberto did an Outstanding job in our Muir Woods & Wine Country tour. Alberto, thank you very much and we wish you
ElizaTrav2022
ElizaTrav2022
00
Amazing Tour Experience!
I love the tour from the beginning, but our bus driver/tour guide “Robert” was really amazing, he made the differen
bdarling123
bdarling123
00
Yosemite tour
A great day out to Yosemite. Gino was a great guide for the day and ensured we had an enjoyable experience.
Z3996ZPbrendanc
Z3996ZPbrendanc
00
Great guides make a great trip
Excellent trip! Very easy to get around from hotel to yosemite and back. Extranomical bus was easy to identify.
Derek H
Derek H
00
A great time in wintery Yosemite
Had a brilliant day in Yosemite. Our guide and drive Rob was exceptionally helpful, entertaining and knowledgeable.
jamesR7507KO
jamesR7507KO
00
Safe driving
Our tour guide, Don was very comforting, driving around those sharp curves leading to the forest as well as the win
Detailed Reviews: Reviews order informed by descriptiveness of user-identified themes such as cleanliness, atmosphere, general tips and location information.
Popular mentions

4.5
578 reviews
Excellent
443
Very good
55
Average
23
Poor
28
Terrible
29

Rachael C
14 contributions
Dec. 2022 • Couples
Rob was our tour guide AND driver for one 1 day tour from San Francisco. Rob was extremely knowledgeable and his passion and love for Yosemite really shone through. He knew so many facts about San Fran to share and we loved hearing it!
Because we went in winter it’s really difficult to pick the good days with high visibility, unlucky for us it was rainy and foggy yesterday but Rob was extremely accommodating (not easy for a bus full of people!) and took us to all the good spots to take photos just in the nick of time before the fog came through.
If you’re heading to Yosemite in winter, wear layers and wear shoes with grip. Get your food from Safeway (first pit stop on the trip) so you’re not wasting time lining up in Yosemite for expensive food (tip from Rob!).
Because it was raining Rob took us all back to our hotels instead of the meeting points. He didn’t have to, but he did it. Ask for Rob when booking in your Yosemite tour with Extranomical Tours.
Written December 30, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.
Dreamer07112266969
Thanks for all the kind words about Rob. He loves showing up Yosemite National Park. So, so glad you could join us. Come back, soon!
Written January 16, 2023
This response is the subjective opinion of the management representative and not of Tripadvisor LLC.

Andy K
Cambridge, UK2 contributions
Jun. 2022
It's ambitious to do a day trip to Yosemite, and it's such a beautiful place that you would absolutely want to spend as much time there as you can if you have it. If you have only one day for it though, this tour is a great way to at least see the park.

Booking the tour was pretty painless, and plenty of information was provided to make sure we were picked up at the right time in the right place.

Our tour guide, Dustin, provided a great mix of information, music and humour throughout and balanced it well with time to nap and just take in the scenery. It made the journey seem much shorter than it was! He was also great at keeping everything running on time so we got as much time as possible in the places it mattered. Can't really ask for a better tour guide!

2 hours in the valley itself is really not that long, but the bus stops at a supermarket on the way out so you can pick up lunch and not have to worry about queueing for that in the park itself. Water was also massively in demand - Dustin provided plenty of it, but it's probably smart to bring lots of your own so you don't have to waste time finding it in the valley.

In the valley there's just about time to pop to lower Yosemite falls, enjoy lunch with a spectacular backdrop and do a short loop over the bridges and along the river. It's enough to just take in the spectacle, and combined with stops at Tunnel View and El Capitan you've probably seen most of the big sights. If you're a hiker though you'll be crying that you can't go off on one of the many trails and really indulge in all that Yosemite has to offer.

If I had one niggle about the tour it would be that the 1.5 hour stop at the giant sequoias was a bit of a letdown - it's a long time out of the day and you don't really get to see much given the time it takes to walk down the hill to the grove and back up (if you're quite fit there's a bit of trail to go around at the bottom, but not a huge amount) - and it's time that would probably be better spent in the valley. That said, it's understandable that the tour would want to keep the stops a bit shorter to keep tabs on people and not let them get too far away from the bus and it was still a nice stop! Grateful that it was on the way in rather than the way out though, as that would have been anticlimactic.

Overall, a really great experience and not too ridiculous a thing to do in one day if that's all you have.
Written July 10, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.
Extranomical
Thanks for taking the time to share so much about your experience on our Yosemite tour. We'll let Dustin know you had a great time! Let's do it again soon.
Written July 11, 2022
This response is the subjective opinion of the management representative and not of Tripadvisor LLC.

Gabs1028
4 contributions
My sisters and I had so much fun on the Yosemite and giant sequoia tour. Denise, our tour guide was knowledgeable and efficient. She took in consideration our safety and honored what we paid for even with a minor time set back caused by some other people in our group not returning at the appropriate time. Being a San Francisco native, Denise was able to give us not only the background history of California, but current events and also recommendations from literature to best restaurants in the area. She drove that bus like her life depended on it! We felt safe and in good hands, so glad I didn’t take that on myself. I highly recommend it! And pray you get Denise!!
Written November 8, 2021
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.
GaryAlan2019
By the sound of it, you and your sisters had a terrific day. Good that you chose the Yosemite tour and got Denise as your guide. Thanks for your kind words.
Written November 18, 2021
This response is the subjective opinion of the management representative and not of Tripadvisor LLC.

Aaron M
5 contributions
Oct. 2022
This company should not be in operation the way they handle crises and treat customers.

Our bus broke down about 45 minutes outside of the park. Our driver, Gino, said this has happened before just a month prior and that the engine just needs to cool down. Approximately fours later and ZERO communication from the driver or the company and it still wasn’t fixed. It was only because the customers took matters into their own hands that we were able to get information about what was happening. It turns out that the it wasn’t the engine that needed cooling down and it felt like we weren’t being told the truth.

We were finally told that we would go back to San Francisco WITHOUT seeing the park on the same bus that wasn’t fixed. It felt extremely unsafe as we coasted down the hills and then crawled up them at 5mph, but the travel director Brad assured us it was safe. He said he would call us in 20 minutes with an update on a replacement bus but did not, and then the replacement bus was not where it said it would be. When we asked Gino for an update he shouted at us. The whole time Gino was extremely nonchalant and unapologetic, talking over people when they asked for answers and initially refusing to call the office, telling us to do it ourselves.

I understand that some things are beyond their control, but the way it was handled showed that they don’t value customers, and this was the second time that this happened within as many months. We were told we would receive a full refund, but only because we pushed for it. If there was any silver lining it’s that all the other travelers were really nice and we were united in our trauma.
Written October 19, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.
Dreamer07112266969
As we responded to this incident in another review, our bus experienced a failure of its turbo charger. Communication during our diagnostics was infrequent since the bus was located in an area with really poor cell service. Ultimately, our staff thought the best and safest course of action was to return to SF. Since our guests did not get what they paid for, we refunded everyone and offered that they take a replacement trip at any time in the future (and did so without be asked). Again, we regret the inconvenience to our guests.
Written October 26, 2022
This response is the subjective opinion of the management representative and not of Tripadvisor LLC.

Patricia F
Playa Mujeres, Mexico1 contribution
Excellent scenery and great visit. All the positives and negative such as not very good bus, it small, no bathrooms, etc. Our guide that has so many fans maybe because she speaks to people from many parts of the world and they don't know American history or should I say revisionist Denis history. She recreated our native American history suggesting the native American willing gave up there language to assimilate with "new" Americans. She needs to stick to the script and stop spitting her PERSONAL opinion about California's water, wildfires etc, where she acquired her "facts" from nameless articles she claims to have read and of course YouTube videos. Her yapping took away from my enjoyment and I wore my headphones to drown her out. She told 2 Italian women the condensed history of olive oil of CA and its "best" which is fine but it's OPINION and Denis is not an expert. It's seems clear she passes her opinion off as facts and presents it to our visitors to this country
Written April 30, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.
Extranomical
Thanks for your review even though it is difficult to hear that you did not enjoy the Denise's commentary. As you apparently saw, she has hundreds of glowing reviews for she manages her Yosemite tour. You're right, many come from all over the country and the world to experience other cultures and opinions that differ from their own. It's one of the things that makes travel so alluring. I'm sorry it did hit the right notes for you. We don't ask our guides to stick to a "script" so please contact our office our Satisfaction Guarantee and we'll do our best to make things right.
Written April 30, 2022
This response is the subjective opinion of the management representative and not of Tripadvisor LLC.

Sujatha T
1 contribution
Jun. 2022 • Family
Denise the bus driver was excellent. She made the trip enjoyable and lively. Her energy level was the same from the start to the end of the trip. Her knowledge about the area was admirable. We would love to go on another trio with her as our guide
The tour operator, extranomical were inefficient. They gave us a wrong pickup time and when we confirmed and had the time in the text, we got an automated response confirming the same. On the day of the tour, we were texting them a question and then they were saying that our tour leaves in 45 minutes and they made a mistake. This was at 5:30 am and the family was still asleep. We all scrambled and got ready and made the bus. The tour operator booked us a Uber ride to the changed pickup location. This was a plus. This definitely was not a great start to the trip. I would think twice about booking with this tour operator.
Written June 21, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.
Extranomical
We're so glad to hear that you had a great time on Denise's Yosemite tour. We apologize for your getting conflicting departure information from your travel agent. In the future, go by the information provided in our email confirmation and phone confirmation the day before the tour. Please call us if you have further questions.
Written June 29, 2022
This response is the subjective opinion of the management representative and not of Tripadvisor LLC.

Sophia P
Romford, UK2 contributions
We booked this day tour as part of a birthday present and it didn’t fail to disappoint. Rob (the tour guide) picked us up right on cue and filled the journey with lots of great and fun facts about San Francisco/the surrounding areas & Yosemite. You could tell he really wanted to give us all a brilliant experience with his enthusiasm and ensured we had ample time at the all stop offs/viewpoints to enjoy the sites. Not to mention Yosemite was absolutely stunning.
Written September 28, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.
Dreamer07112266969
Rob is passionate about Yosemite and loves showing it off to guests. We'll let him know you had a great time!
Written October 3, 2022
This response is the subjective opinion of the management representative and not of Tripadvisor LLC.

Dee M
St. Petersburg, FL4 contributions
This tour was one on our bucket list. My husband and I were celebrating our one year wedding anniversary since we couldn't do much of a honeymoon last year due to Covid. We are so so glad we did this tour. And our tour guide, Denise, was an added bonus! Simply put, Denise was top notch!! She is so sweet as a person, so knowledgeable and very passionate and skilled at what she does. We could not have had a better tour guide I don't think. This trip is an all day tour from sun up until sun down. So layer up, wear comfortable closed-toe shoes and pack a bag full of water and healthy snacks. From the beginning of the trip, Denise set the expectations for the day. She introduced herself and advised of safety measures and things we could expect for the trip. She explained the importance of safety and staying on schedule to make the most of the trip so do your best to follow her instruction. She kept us safe the entire length of the trip so trust and have confidence in her. Now for the trip, as we left San Francisco to head to Yosemite, she talked about fun facts and historical sights the majority of the way there. Personally, this helped to distract my mind from the lengthy journey up there. When we arrived to see the sequoias, she explained the rugged trek to walk down to see them. It is not a walk for the faint of heart so be sure you can get back up at an incline from the walk down. I'm not in shape right now and I was able to do it so just pace yourself and take short breaks as needed and drink water. Many people were not able to do it so listen to your body. We saw El Cap, Half Dome, Yosemite Valley and more. Denise gave us ideas on picture taking and helped us take photos too. She didn't have to do that so this was such a bonus. She was interactive with each guest and continuously ensured everyone's safety and involvement. She showed us the beautiful waterfalls as we passed by them and the few we could stop long enough to see. She has many stories about many of them that she shared. She stopped for us to see the mountain climbers and explained how Yosemite has a way of healing people. I didn't understand that until after the experience we had at Yosemite. It is all completely majestic and just so spectacular all around. Every moment was breathtaking and so serene. This is definitely a trip that heals the mind, body and soul. We absolutely loved this trip and would love to do it again and again! Thank you Denise for making this trip one for the books! We will forever have and treasure these memories!! And if we are able to do it again, we hope to have Denise again or someone who can match her skills!!
Written November 12, 2021
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.
GaryAlan2019
I couldn't have said it better. Denise and all of us here at Extranomical appreciate your kind words! Happy anniversary!
Written November 18, 2021
This response is the subjective opinion of the management representative and not of Tripadvisor LLC.

koty a
2 contributions
Jul. 2022 • Couples
The bus was older and had difficulty keeping the bus cool. On the way back they picked up a camper that was not part of the original group. All the 34 tourists were in the us for few minutes and our guide/chauffeur Mike apologized for the delay and that he contacted his office and they were getting in touch with him and that we should be out of there in 5 minutes. Mike then left the bus with the doors open for the next 30 minutes while they were waiting on the tourist leaving everyone on the bus cooking. When Mike finally closed the door I requested him to turn down the temperature, he asked if it was warm and said it was because the door was open. Another lady from the back yelled that she was cooking. The bus stayed warm and uncomfortable until after the dinner break hours later. I would not recommend them. The trip concluded later than expected. PERIOD
Written July 11, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.
Extranomical
Thanks for your review. We have spoken with the driver about leaving the door open for such a long time, and not adjusting the coach temperature quickly enough. Please contact our Guest Services office @ (415) 357-0700 about our Satisfaction Guarantee.
Written July 25, 2022
This response is the subjective opinion of the management representative and not of Tripadvisor LLC.

Lydia L
7 contributions
ROB is a great tour guide. Genuine man and very informative. The only thing I’ll mention to Rob’s employer: please upgrade your bus!!!Sitting at the back row was very bumpy and got motion sickness/felt puky from it. Also it didn’t help that the whole bus was full and we were squished in like sardines
Written November 25, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.
Dreamer07112266969
Thanks for your kind words about Rob, we will make sure he knows you had a great time. Sorry about the back row...we generally block those seats but we were especially busy over the Thanksgiving holiday. Let us know next time and we'll get you a front row seat!
Written November 29, 2022
This response is the subjective opinion of the management representative and not of Tripadvisor LLC.

Showing results 1-10 of 528

2023 Yosemite National Park and Giant Sequoias Day Trip from San Francisco