Arapahoe Basin Ski Area unveiled plans for a terrain expansion into The Beavers and The Steep Gullies areas following an extensive review process. The ski area plans to expand west of the Basin’s much-loved Pallavicini Face, increasing Arapahoe Basin’s terrain by 468 acres, for a grand total of 1,428 skiable acres.

Intermediates on up will be all about The Beavers, which is set to include groomed intermediate blue runs, bowl skiing, and glade skiing. The Gullies will be solely for advanced skiers, with double-black diamonds falling into a skin or hike exit out of the area. The steep and narrow chutes will be numbered 1 through 7, and will become the most challenging skiing at A Basin. That’s saying something.

For now, The Beavers and The Steep Gullies remain an unpatrolled and unmitigated backcountry area for the remainder of the season. Starting next season, advanced skiers can access The Gullies’ 129 hike-back acres and a portion of the Beavers via the Pallavicini Lift as in-bounds hike-back terrain.

At the beginning of the 2018-19 season, skiers will be able to lap The Beavers’ 339 acres via a new fixed-grip quad.

Beavers and Steep Gullies Expansion

The Steep Gullies terrain will become A Basin's most extreme.

More information regarding Arapahoe Basin’s expansion can be found here.


Summer 2017: Construction will begin on 468 acres in The Beavers & The Steep Gullies, including egress routes, glading and cutting of groomed trails.

2017-2018 ski season: The Steep Gullies & a portion of The Beavers will open to skiing and riding as in-bounds hike-back terrain.

Summer 2018: Installation of a fixed-grip quad chairlift in The Beavers commences.

2018-2019 ski season: The Beavers opens as lift-served terrain (339 acres).