- Natural Features and Nature Preserve- The basis for the acquisition of Castle Rock State Park is the protection of natural resouces that are unique to Illinois. A thin layer of glacial till covers this region and several distinctive plant species, remnants of the native forest and prairie, still exist. In one valley, 27 different types of ferns have been identified. The park is one of the largest significant natural areas in the northern part of Illinois.
Most of the outstanding natural features are located in the dedicated Nature Preserve which is protected by state law. Use of the 710-acre preserve will be restricted to scientific study and limited interpretation activities.
Picnicking- There are three picnic areas available for use with shelters, picnic tables, playground equipment, grills, toilets, and drinking water. There are also scattered tables for use along the river. One of the picnic areas offers a beautiful view over the Rock River Valley. Two of the park's shelters may be reserved with a fee.
Trails- There are six miles of marked hiking trails developed at this time. These trails offer the opportunity to view woodland animals and birds that inhabit the park. The trails' scenic views also offer many chances for the photographers to sharpen their skills. More trails are planned with the park's development. Cross-country skiing and tobogganing are also available when weather permits.
Fishing and Boating- All the fishing is done in the Rock River. The park offers one and one-half miles of bank fishing. There is also a boat ramp available for public use. Boat size is limited due to the varying depth of the river. The most commonly caught fish is the catfish, but some bass, northern, walleye, and crappie may be taken.
Hunting- Limited squirrel, turkey and deer hunting is available at the park. For more information, please contact the park office.
Castle Rock State Park is located on IL Hwy 2, 4 miles south of Oregon, IL., 12 miles north of Dixon, IL.
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