Capulin Volcano National Monument is located 7 mi (11 km) south of Folsom. Rising to 8,182 ft (2,494 m) above sea level, Capulin is the highest mountain near Folsom. Folsom Falls is about 3 miles northeast of the town, along New Mexico State Highway 456. The Cimarron River, only a small stream a few feet wide here, is stocked with trout annually. Eight miles (13 km) west of the city below Johnson Mesa is Wild Horse Arroyo, where in 1908, a cowboy named George McJunkin discovered the bones of an extinct bison. This archaeological find later proved ancient man had been in the Americas at least 10,000 years, far longer than earlier believed.