The park contains a specialized wildlife area managed by the Wisconsin Department of Natural Resources to protect the habitat of the Karner blue butterfly, an endangered species.
The park's creation was largely driven by the development of the Castle Rock Flowage hydroelectric project in the late 1940s.
Much of the park features sand barrens, a rare ecosystem in the Midwest that requires periodic controlled burns to remain healthy.
The park includes dedicated islands within the flowage that provide unique, secluded camping experiences.
The 1.5-mile accessible boardwalk was constructed to provide elevated views of the marsh ecosystem without disturbing the sensitive wetland floor.
Buckhorn State Park is situated on a peninsula within the Castle Rock Flowage, the fourth largest inland lake in Wisconsin. The park landscape features a diverse range of habitats including sand prairies, oak savannas, and pine barrens. Visitors can access over 8,000 acres of combined park and wildlife area managed for outdoor recreation and ecological conservation. The geography is characterized by sandy soils and significant wetland areas that support a variety of migratory birds and waterfowl. A major feature is the 1.5-mile accessible boardwalk trail that traverses the marsh and pine forest. The park provides primitive and semi-primitive camping options, including several sites accessible only by boat. Hunting, fishing, and trapping are permitted in designated areas of the park during state-regulated seasons. The shoreline offers multiple boat launches and a swimming beach with a large sandy shoreline.
The mid-point of the elevated boardwalk during sunset, looking out over the Castle Rock Flowage.
Bring insect repellent during the summer months, as the marshy environment supports a high density of mosquitoes and biting flies.
Check the Wisconsin DNR website for current prescribed burn notices, as these can temporarily close certain trails.
If you are camping, prioritize booking the remote boat-in sites for maximum privacy away from the main camping loops.
Do not attempt to hike through marshy areas off the designated boardwalks, as the ground can be unstable and protected nesting habitats are easily damaged.
Some interior roads and secondary trails may be inaccessible during the spring thaw or following heavy rain events.
Practice Leave No Trace principles; keep pets on a leash no longer than 8 feet at all times; do not remove natural materials like pinecones or driftwood.
