198 miles RT. Gravel/dirt road that leads deep into the park. You can pay for a shuttle ride and get dropped at any point. You can bike beyond the distance shuttle buses are allowed. You can shuttle to the furthest point and bike back. This gives you the flexibility to grab another return shuttle once you're tired. No riding off this main gravel trail. Check out elevation maps at the Visitor's Center. Be bear aware and don't forget a bear bell!