The Cache la Poudre River runs right through Fort Collins before rising into the mountains through a dramatic canyon to the west. The canyon section — reached via Highway 14 from the northwest edge of the city — is where the river gets serious: a designated Wild and Scenic River with stretches of whitewater ranging from beginner-friendly Class II to challenging Class IV rapids.
Several Fort Collins outfitters run guided rafting trips on the Poudre from May through August, when snowmelt keeps the water levels up. The canyon road also gives access to excellent hiking trails and campgrounds in the Roosevelt National Forest. Closer to town, the river runs through a greenbelt where locals walk and cycle; the trail system along the river is one of Fort Collins' best features and connects several parks and neighbourhoods.