The U.S. Forest Service has approved the resort's Peak 6 Project, which would add nearly 550 acres of skiable terrain, two lifts, a restroom facility and a warming hut.
Environmentalists complained that cutting down trees to make more ski runs could hurt Canada lynx and other endangered animals. Some residents objected because they feared overcrowding in town.
According to the Summit Daily, the plan has the support of 45 individuals and environmental groups.
Vail Resorts Inc., which operates the ski area, says it expects to have the new terrain ready for the 2013-2014 ski season.
(Copyright 2012 by The Associated Press. All Rights Reserved.)