Wild Basin a region in the southeast corner Rocky Mountain National Park in Colorado, United States. The primary entrance is located north of Allenspark off State Highway 7.

A dirt road leads to a ranger station, parking and horseback or hiking trails. The trail to Bluebird Lake and Ouzel Lake follows the North St. Vrain Creek (which is a tributary of the South Platte River)^[1] passing Calypso Cascades and Ouzel Falls along the way, leading to Ouzel Lake and Bluebird Lake. Both Ouzel Falls and Ouzel Lake are named after a North American species of bird, Cinclus mexicanus, also known as a dipper.^[2] Other trails lead to Thunder Lake, Finch Lake, and Pear Lake.