The Swan Mountain Flyer is the Summit Stage bus that runs from Breckenridge to Keystone to A-Basin. From now through Sunday, May 26, it will run its normal route on Saturdays and Sundays ONLY. The bus leaves River Run at Keystone heading for The Basin on the hour between 7 AM and 5 PM. It leaves A-Basin at :15 after the hour from 7:15 until 5:15.