Hi there! My Fiance and I just did this two weeks ago and it was wonderful. The guide really does a good job of scaring people so that they know exactly what they are signing up for. Our group was 11 people, and everybody did just fine, though they do not allow children under 13 to do this tour. We barely saw any flowing lava, though we did get close to the lava flowing from the Pali (cliff), which was pretty neat to see. I've heard that the flow has recently nearly stopped completely, but I would check with the company first as they have hourly information on the flow. Our hike ended up being 10.5 miles round trip and took around five hours. Keep in mind that you are walking over rough glass-like terrain that sounds like crunchy snow. I didn't find it to be strenuous, as it's quite flat, though the smoke can affect people with asthma. My feet were very sore by the end of the hike, and saimin at Ken's House of Pancakes never tasted so good (dinner is included in the cost of the tour.) Feel free to read my review on this hike, as I went pretty far into detail. Good luck! :-)

This is a wonderful tour, rain or shine. You will not be disappointed. You will be on a private plantation, and see approx 6+ waterfalls. The tour guide will help you along to some beautiful photo ops, and tastes of the wild. The ending lunch spot is picturesque and very delicious. If you Google search Hawaii Forest and Trail they have a very informative web site, and check out the tour Kohala Waterfalls Adventure, it will show you all the details.