Great hike but be warned there's tons of mosquitos-just bring bug spray and you'll be fine. The waterfall and view of Mt. Rainer was well worth the hike which was flat until you reached the incline to the waterfall (maybe a mile of moderate climb). Once at the American River you can 1) forge through the river ( max 4' deep) or follow the river down about 100 yards to cross the at a log jam. Our dog did this great!