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Upper Keystone is a steep groomed trail that begins off the Silver Queen Road and quickly descends down to the front side and base area, finishing at Upper Park.
It is also accessed by the Ruby Road, which cuts in from the right near the top of the run.
It is a great trail for fast skiers who like to carve! It is also an access point for the lower pitches of Keystone Ridge (West Wall).
Near the bottom of Upper Keystone, you can dip off to the right to catch steep bumped runs like Horseshoe, Horseshoe Springs, and Peoria.