Illinois
Clark County has three great parks for family camping and recreation...
Our county park, Mill Creek has complete camping facilities, including hook-ups, shower facilities, recreation areas and the county's largest lake with plenty of room for fishing, water skiing & boating. Mill Creek also offers cabin rentals, hiking, RV and bridle trails, boat rentals and more.
Lincoln Trail State Park, just south of Marshall has a fishing lake and great camping with all the amenities as well. Lincoln Trail offers a newly remodeled restaurant, and a very scenic drive around the lake and a nice hiking trail.
Cycling 
Planning is underway for county wide bike paths, you will find excellent biking opportunities in both local parks, Mill Creek and Lincoln Trail State Park.
Trail Walking - Hiking 
Mill Creek offers 4 great trails - easy to moderate walks and up to over 2½ miles long. Lincoln Trail State Park offers 2 trails.