Cuivre River State Park Backcountry is a standout hiking destination in Troy, MO, covering 15.0 miles with 1000ft of elevation change. Stats: 15.0 miles, 1000ft gain, Hard. Type: Loop. Surface: Rocky. Time: 7 hours. Fee: $5/vehicle. Dogs: Yes, on leash. Permit: No. Wildlife: deer, turkeys, foxes. Best seasons: Largest undeveloped area in eastern Missouri. Pack water, layers, and appropriate footwear. Conditions vary across MO. Leave No Trace: stay on trail, pack out all waste, respect wildlife.