It is the third year for the annual 36 Hours of Keystone. The lifts will stay open non-stop for the entire time as teams compete to get in the most runs. Boarders and skiers are welcome in teams of two or four. This year, there is a shorter version available, the 36 Express Challenge, which is teams of one to four skiing or riding for 12 hours. That works out to one lap per hour for a total of 12 runs. There are cash prizes along with a fully festive atmosphere. To sign up, call 800-468-5004.