Duncan Cabin is a historic 1880s one-room cabin at 8,120 feet in Rio Grande National Forest, accessible only by a 4-mile hike, mountain bike, or horseback from Liberty Gate trailhead (featuring sandy/rocky terrain and a stream crossing).

The cabin accommodates up to 6 people with basic amenities including a wood stove, bunk beds, and nearby Pole Creek for water access, making it ideal for backcountry adventurers seeking solitude and excellent stargazing near Great Sand Dunes National Park.

Reservations ($40/night, up to 6 months in advance) are available through Recreation. gov; the site includes a restored corral for horses and vault toilet facilities.