Cookies make us hungry! But seriously, our website and/or its third-party tools use cookies, which are necessary to its functioning and are required to achieve the purposes illustrated in the privacy policy. By continuing to use our site, you consent to the use of cookies.

The Beavers and The Steep Gullies

This terrain will open again in winter 2019-20

The Beavers & The Steep Gullies is Arapahoe Basin's newest terrain, added for the 2017-18 season, and includes 36 runs over 468 total acres for ability levels from intermediate through expert.

Approximately 339 acres of terrain in The Beavers are served by a four-person chairlift, added for the 2018-19 season. Runs include two intermediate groomed routes (steep blues), open bowls and some of the best glade (tree) skiing in Colorado.

The extreme terrain of The Steep Gullies (129 acres) is for experts only. All skiers using that terrain are required to hike back to the bottom of the Pallavicini Lift; this hike takes approximately 20-30 minutes.

Trail Map: The Beavers & The Steep Gullies


Located to the west of the current ski area boundary, the new terrain added approximately 468 acres of skiable terrain to Arapahoe Basin, bringing the ski area’s total acreage to 1,428 acres. The new terrain accommodates a wide range of skiers, from intermediates to experts. 

About the Terrain

The Beavers

Terrain in The Beavers runs the gamut from intermediate (blue square) groomed runs to most difficult and extreme (black and double-black diamond) tree skiing. The terrain is rolling and varied, with open bowl skiing at the top and glades on the west side and the lower 2/3 of the terrain. Loafer and Davis are our new groomed intermediate runs in The Beavers.

The Steep Gullies

The Steep Gullies is the most challenging skiing at Arapahoe Basin. These steep, narrow chutes vary in pitch and width, and are rated as "extreme" (double-black diamond). All terrain in The Steep Gullies is designated as "hike back," meaning that guests must hike or skin back to the bottom of the Pallavicini Lift upon completion of their run.

Fast Facts

  • Acreage
    • 468 total acres
    • 339 lift-served acres in The Beavers
    • 129 hike-back acres in The Steep Gullies
  • Chairlift stats
    • To be installed Summer 2018, opening 2018-19 ski season
    • The Beavers chair will be a fixed-grip quad (4 people per chair)
    • Lift manufacturer: Leitner-Poma
  • About the hike back trail
    • The hike back trail leads from the bottom of The Beavers & The Steep Gullies terrain to the bottom terminal of the Pallavicini Lift
    • Hike time is approximately 20-30 minutes, depending on equipment and fitness level
    • Guests may use skins to make their way back to the lift

Construction Timeline

Summer 2017Construction began on 468 acres in The Beavers & The Steep Gullies, including egress routes, glading and cutting of groomed trails
2017-18 ski seasonThe Steep Gullies and a portion of The Beavers opened to skiing and riding as in-bounds hike-back terrain
Summer 2018Installation of a fixed-grip quad chairlift in The Beavers 
2018-19 ski seasonThe Beavers opened as lift-served terrain (339 acres) while The Steep Gullies remains hike-back terrain*
* skiers hike along an egress route to the bottom of the Pallavicini Lift

Master Development Plan documents

The U.S. Forest Service conducted a thorough Environmental Review and public commenting process. To read U.S. Forest Service documentation related to The Beavers & The Steep Gullies expansion, click here.

November 2016: The USFS released the Final Record of Decision approving expansion into The Beavers & The Steep Gullies.

August 2016: The USFS released the Final Environmental Impact Statement and Draft Record of Decision.

February 2016: The USFS released the Draft Environment Impact Statement (EIS), commencing a 45-day public comment period.

October 2013: On October 3, we hosted a guided hike of the proposed Beavers expansion area. Click here to read the Summit Daily News recap of the hike.

For information on our projects and process of our Master Development Plan, read this document:
Public Notice - Arapahoe Basin Proposed Projects (U.S. Forest Service)

The 2012 Master Development Plan is available to the public. Click here to download the PDF (9MB). Please note: the file is large and may take a moment to download.

Have questions about the expansion? Contact us!

For media inquiries or questions about the expansion into The Beavers & The Steep Gullies, email us at

Follow Us & Stay On Top
Sign up for our newsletter
Check out our YouTube channel for footage from The Legend!