Whitewater State Park Loop is a standout hiking destination in Altura, MN, covering 10.0 miles with 1000ft of elevation change. Stats: 10.0 miles, 1000ft gain, Hard. Type: Loop. Surface: Rocky. Time: 5 hours. Fee: $7/vehicle. Dogs: Yes, on leash. Permit: No. Wildlife: deer, turkeys, herons. Best seasons: Spring-fed stream canyon in bluff country. Pack water, layers, and appropriate footwear. Conditions vary across MN. Leave No Trace: stay on trail, pack out all waste, respect wildlife.