While there’s plenty to see from Yellowstone’s roads, most of the park—98 percent—is rugged, beautiful, dynamic wilderness. To explore Yellowstone’s wild side, get off the beaten path and onto the park’s 1,300-mile trail system.

Want to go on a guided hike? Try these top-rated guides: Hotel-Based Hiking with National Park Trips, In Our Nature Guiding Services, Roam Yellowstone, Wildland Trekking, Yellowstone Forever and Yellowstone Hiking Guides.