Willow Creek, a tributary on the Colorado River near Granby, Colorado, is diverted by Willow Creek Dam and Canal, features of the Colorado-Big Thompson Project. Willow Creek Pumping Plant lifts the water 175 feet; it then flows by gravity to Lake Granby.Recreation is managed for Reclamation by the Forest Service. Developments include 1 campground with 35 campsites and 1 boat-launch facility. Good access exists. Total water surface available for recreation is approximately 300 surface acres. Primary recreational activities are fishing, camping, and picnicking. Primary sport fish available are brown trout, rainbow trout, and salmon. Facilities and campground are closed in winter because of ice and snow. Current Reservoir Levels.