Florida River is a 61.7-mile-long (99.3 km) tributary of the Animas River in La Plata County, Colorado.The river's source is Lillie Lake in the Weminuche Wilderness. After being impounded by the Lemon Dam to form Lemon Reservoir about fifteen miles northeast of Durango, it joins the Animas River south of Durango on the Southern Ute Indian Reservation near the New Mexico state line.