Robbers Cave Nature Trail offers a memorable hiking experience in Wilburton, OK. Covering 3.5 miles with 400 feet of elevation change, this moderate trail showcases Oklahoma's varied landscapes. Trail specs: 3.5 miles, 400ft elevation gain, Moderate difficulty. Type: Loop. Surface: Rocky. Time: 2 hours. Fee: $6/vehicle. Dogs: Yes, on leash. Permit: No. Wildlife sightings include white-tailed deer, black bears, bats. Oklahoma's diverse ecosystems support a surprising range of species. Best times: Year-round; sandstone caves used by outlaws. Gear up with sturdy footwear, plenty of water, and sun protection. Oklahoma weather can shift quickly—check forecasts before heading out. Follow Leave No Trace principles: carry out all trash, stay on marked trails, and respect wildlife and other visitors.