Castle Rock State Park open year-round except for deer firearm hunting seasons; the park will be closed to all activities for the following 2025/2026 Deer firearm season dates: Nov. 21-23, Dec. 4-7, and Dec. 12-14. April 14 - May 15 the south end trails are closed daily until 1 pm for Spring turkey seasons. The river access canoe campground is open May 1 - Oct. 31. River conditions may result in temporary closure of the campground; call the park at 815/732-7329 for current river/campground conditions.
A sandstone bluff above the Rock River gives this Ogle County park its name, with ravines and northern plant communities on the rolling ground behind it. Three miles south of Oregon, it rewards a hike, a paddle or a quiet afternoon of fishing.