There's nothing lazy about a summer in Keystone, unless that's what you want of course! For adventure seekers, the Rocky Mountains offer two award-winning Keystone golf courses, miles of mountain biking trails, hiking, horseback riding, fly-fishing, whitewater rafting, and more! And for those looking for a more relaxed time, choose from festivals, films, concerts, and spa packages, or, stroll or bike along Keystone's miles of paved pathways, soaking in the scenic splendor. Keystone's summer operations close on Sunday, September 16.