Sun Valley is consistently rated in the top ten by Ski Magazine. Bald Mountain's seven high-speed quads, four triples and five doubles take skiers to a height of 9,150 feet (2,789m), and its terrain includes glades, bowls, bumps, groomers, tree skiing, and easy rollers. It is also famous for its lack of lift lines, allowing for more time on the slopes. Dollar Mountain's gentler, treeless slopes are perfect for beginners, and its tubing hill is popular with families. Snowboarders aren't neglected either, as Bald Mountain is now home to a brand new super pipe. Sun Valley also has one of the most extensive and well-maintained Nordic trail systems in the country. The Wells Fargo Boulder Mountain Tour, one of the country's top cross-country skiing events, is held here each year. Sun Valley is the birthplace of heli-skiing, and the stunning 7,000- to 10,000-foot (2,134m-3,048m) Rocky Mountain range also has well-equipped huts and Mongolian-style yurts for backcountry skiers.