Whitewater Rivers in and near the Medicine Bow Mountains, Wyoming 1   Cache La Poudre River - North Fork Class IV-V - 9 miles long (Cherokee Park Road to Halligan) Larimer County 2   Cache La Poudre River Class III-IV - 8 miles long (Indian Meadows Bridge to Narrows Picnic Ground) Larimer County 3   Cache La Poudre River Class III-IV - 9.5 miles long (Home Moraine to Indian Meadows Bridge) Larimer County 4   Cache La Poudre River Class III-IV - 3.3 miles long (Steven's Gulch Access to Mishawaka Inn) Larimer County 5   Cache La Poudre River Class IV-V+ - 3.4 miles long (Narrows Picninc Ground to Steven's Gulch Access) Larimer County 6   Cache La Poudre River Class III - 3 miles long (Mishiwaka Inn to Poudre Park Picnic Ground) Larimer County 7   Cache La Poudre River Class V - 2.4 miles long (Big South Campground to Tunnel Picnic Ground) Larimer County 8   Cache La Poudre River - South Fork Class IV-V - 12.5 miles long (Fish Creek Trailhead to Main fork) Larimer County 9   Joe Wright Creek Class V - 3 miles long (County Road 103 bridge to Big South Campground) Larimer County