In the summer, water sports are especially popular, and there is canoeing, boating, water skiing, and sailing on the flowage. The park has a boat landing and a canoe landing, a beach and bathhouse, and picnic areas, including a shelter near the boat launch that offers electricity. Buckhorn is popular with campers who like to get away from traffic for its excellent walk-in campsites. The park has 22 of these sites, which are all 1ocated on the shoreline of the Castle Rock Flowage. There is a push cart available for campers to haul in gear to the sites that are farther from parking.
Many visitors also load their equipment in boats and motor or paddle to their site.
The walk-in sites all have picnic tables and fire rings. A portable toilet is located near the sites. These sites do not have electrical hookups and are approximately 300 yards from the flowage. There are two group sites that can accommodate up to 40 people at each site. The group camp area has a pit toilet, hand pump, volleyball court and a horseshoe pit.