Starr Cave State Preserve Trail is a standout hiking destination in Burlington, IA, covering 3.0 miles with 300ft of elevation change. Stats: 3.0 miles, 300ft gain, Moderate. Type: Loop. Surface: Rocky. Time: 1.5 hours. Fee: Free. Dogs: Yes, on leash. Permit: No. Wildlife: deer, bats, cave crickets. Best seasons: Limestone cave complex above the Skunk River. Pack water, layers, and appropriate footwear. Conditions vary across IA. Leave No Trace: stay on trail, pack out all waste, respect wildlife.