The Thunder Lake Trail-Bluebird Lake Trail near Allens Park, Colorado was built in 1926. It was designed by National Park Service architects and was built by the Civilian Conservation Corps. It includes Late 19th and Early 20th Century American Movements, Rustic, and other architecture. The trail subsumes or is associated with Ouzel Lake Trail, the Arbuckle Lake(s) Trail, the Wild Basin Trail, and the North St. Vrain Creek Trail. It was listed on the National Register of Historic Places in 2008. The listing included 24.6 acres (10.0 ha) with one contributing structure.