Roughlock Falls Nature Area is a nature area in Lawrence County, South Dakota in the United States. It is located in Spearfish Canyon, near Little Spearfish Creek, just before the creek joins Spearfish Creek, within the Black Hills National Forest. The area is managed by the South Dakota Department of Game, Fish, and Parks. Birdwatching, fishing, hiking, and snowmobiling are popular activities within this area. The area is about southwest of Spearfish or about west of Lead, just west of Spearfish Canyon Scenic Byway (U.S. 14A).
Wildlife found in the area include: Elk, Bald eagle, White-tailed deer, Mule deer, Coyote, Beaver, Bighorn sheep, Mountain goat, and Mountain lion.