Along with a great location, the resort offers a heated outdoor pool/hot tub and a sauna. From late November to early April, skiing is the undisputed favorite outdoor sport. Summer in Aspen brings hiking, Jeep tours, horseback riding, and biking. Lakes, rivers, and streams offer gold-medal fly fishing, boating, and white-water rafting. Aspen also has an18-hole golf course, several tennis courts, and many cultural activities.