We did the hike on Aug 31. The hike itself is very easy, not steep at all and I would have to agree with our youngest a little boring, probably just because it was too easy (we are mid-40s, in average shape, and 2 boys 13 and 9). But when you reach the top and see Mt. Shasta it makes it so worth the time! It takes about 4 hours to go up and back. It wasn't cold at the top although there was still enough snow. The trail is under construction and open to the top only some days, so check nps.gov before planning. And definitely plan it if you are visiting Lassen NP!