If you want to ski down the mountainside, you'll need to make your way to the top of it first. Hop on Summit Express Ski Lift and enjoy the ride.
You'll have sightseeing choices galore when visiting Keystone. Summit Express Ski Lift is a great place to kick off here, but there are many other fine sights to check out. Loveland Ski Area, Arapahoe Basin Ski Area, and River Run Gondola Ski Lift are close to the mountainside transportation system and will round out your day nicely.