State Highway 387 is a 5.2 mi (8.4 km) long state highway in western Colorado.

The route begins in the south at U.S. Highway 50 approximately ten miles east of Montrose and travels north to provide access to Black Canyon of the Gunnison National Park's south rim facilities.

The route was established in 1939 with its current routing. The entire route from US 50 to Black Canyon of the Gunnison National Park was paved by 1960. The nat'l park was upgraded from a national monument in October 1999.

The entire route is located in Montrose County.