Great size, crowd control, Terrain Park, Trees, Steep, night skiing
On the Colorado Pass Keystone is far and away my favorite resort. It is definitely that: a resort. From Radio Flyer wagons in the parking lot to haul kids or gear or both, to the new faster gondola, Keystone is an appealing resort to families. Additionally, for all the powder hounds, hikers, park rats, and mogul junkies, Keystone does an excellent job of separating the crowds, as opposed to Breckenridge where every FULL run essentially dumps the skiier at one or two places. The 3 mountain separation of Keystone is crucial. A51 is a sick park and it also does a killer job of separating the first-time jibbers from the invert skiiers. My personal favorite feature of Keystone is the hiking/snowcat terrain above Dercum Mountain (the windows, independence bowl...), North Peak (Bergman Bowl), and all of the Outback. The only downside is that they have kept up with Vail, BC, and Breck in the $90+ ticket for a mountain that can occasionally hurt for snow. Keystone lodging, however, is generally less expensive than their counterparts.