Sales of cards offering discounts at Powderhorn Mountain Resort and 10 other Colorado ski resorts will end for the season on Feb. 28.

The Colorado Gems Card sells for $39 and offers 2-for-1 lift tickets or a 30 percent discount off single tickets.

In addition to Powderhorn, the other participating resorts are: Arapahoe Basin, Cooper, Echo Mountain, Eldora, Granby Ranch, Hesperus, Kendall Mountain, Loveland, Monarch and Sunlight Mountain.

Registration for a separate $59 card offering four full days of skiing at each of 21 Colorado resorts for fourth, fifth and sixth grade students also ends Feb. 28.

For more information, visit the website at www.coloradoski.com.