The slide caught the heli-skiers late Tuesday afternoon in the Chugach Mountains near the skiing community of Girdwood, located about 40 miles (64 kilometers) south of Anchorage, said McDaniel.

At the top of the mountain is the Seven Glaciers Restaurant, named for its view. Each winter, 25 to 30 people die in avalanches in the U.S., according to the National Avalanche Center. Alaska ...