Minneopa State Park Bison Loop is a standout hiking destination in Mankato, MN, covering 4.0 miles with 200ft of elevation change. Stats: 4.0 miles, 200ft gain, Easy. Type: Loop. Surface: Grass. Time: 2 hours. Fee: $7/vehicle. Dogs: Yes, on leash. Permit: No. Wildlife: bison, eagles, deer. Best seasons: Drive-through bison range plus walking trail. Pack water, layers, and appropriate footwear. Conditions vary across MN. Leave No Trace: stay on trail, pack out all waste, respect wildlife.