 As of July 4th until September 22nd, you don't need a reservation. Crystal Mountain has the clearance having the shuttle. It is not a free shuttle, by the way. I encourage you to go to the website for make that Crystal Mountain Ski Resort and look up the Mount Rainier Shuttle Service and it explains all of the policy there and the times of the shuttle that's being offered here, the cost, and just to guarantee, of course, you get a ride back to the parking lot there at Crystal Mountain Ski Area.