National Park Service architect William Carnes designed an unusually clean, handsome, gabled cottage that was skillfully executed by WPA labor in red sandstone excavated during the construction of Rimrock Road. This residence is part of the Saddlehorn Historic District (NRD), which includes the Saddlehorn Campground Comfort Station (1937, William G. Carnes). Sturdy sandstone chunks, which are stepped at the corners, and a cedar shingle gable roof with eaves and exposed rafter ends make this restroom a good example of rustic design. Even the original wrought iron hardware and plank doors survive. The historic district protects humbler service buildings, also characterized by red sandstone, red tile roofs, and labor-intensive WPA and CCC craftsmanship.