We went here with another couple. The hike is moderate with more than a few uphill grades. But the path is wide & well maintained; it isn't rocky or full of roots. It took us about 2.5 hours because we stop to rest and we take a lot of photos. The sights are very pretty. The flume walkway itself is worth the hike. But there other interesting sights. I'm going back the next time I'm in NH.