Keystone Resort is a ski resort located in Keystone, Colorado, United States. Since 1997, the resort has been owned and operated by Vail Resorts. It consists of three mountains – Dercum Mountain, North Peak, and the Outback – and five Bowls. The three mountains are connected by a series of ski lifts and gondolas with access from two base areas.

Yan Lift, incorporated as Lift Engineering & Mfg. Co., was a major ski lift manufacturer in North America. Founded in 1965 and based in Carson City, Nevada, the company built at least 200 fixed-grip chairlifts, as well as 31 high-speed quads. The company's lifts have been involved in the deaths of five people and the injury of at least 70, the worst record of any ski-lift maker operating in North America.