With 4,200 skiable acres, the Lake Louise ski area rates as one of North America’s largest. The longest run stretches for five miles and there are plenty of gut-wrenching steeps to challenge your teens as well as open bowls, chutes and beginner and intermediate trails. Kidski provides supervised skiing and instruction for children ages 5 through 12; Shreddies does the same for snowboarders ages 7 through 12. In March and April, when snow may be thin at U.S. resorts, Lake Louise typically has terrific snow cover. Take advantage of spring’s mild temperatures and good deals to enjoy the last — and maybe the best — of the season’s skiing. The Lake Louise Ski area is about an eight-minute drive from the Chateau Lake Louise, which provides complimentary shuttle service.