Cottonwood Canyons Avalanche Information //

UDOT uses remote avalanche control systems (RACS) and artillery to trigger avalanches that threaten public roads throughout Utah. Avalanche mitigation cannot take place if people are near targets so UDOT will temporarily close specific backcountry areas and roads, working with local law enforcement.

Follow @UDOTavy on Twitter and Instagram for more information on avalanche mitigation and backcountry closures or visit the UDOT Avalanche Safety website.


There are 64 slide paths in Little Cottonwood Canyon alone, with over half of SR-210 threatened by avalanches. Over 50 buildings and 76% of the road passing through Snowbird and the Town of Alta are in avalanche paths. The road is fully closed to the public when avalanche mitigation is in progress.

UDOT LCC Avalanche Cycle: Feb. 12-18, 2021
UDOT LCC Avalanche Cycle: Feb. 6-8, 2020
Do's & Don'ts for Avalanche Road Closures


Prepare for a great day of enjoying the #TheGreatestSnowOnEarth by respecting all UDOT avalanche backcountry and road closures.

Backcountry closures begin before planned avalanche road closures to ensure complete evacuation, with a typical closure starting at 10 p.m. the night before control work. Please respect these closures to protect yourself, the public, and future access for backcountry users.

Overnight road closures typically begin the night before, often between 10:00pm and 12:30am. Avalanche closures may also occur during the daytime as conditions warrant.

After large storms, UDOT may close the gates to the Spruces (Big Cottonwood Canyon) and White Pine Trailhead parking areas (Little Cottonwood Canyon) for snow removal work to create more parking spaces. Parking in some trailhead areas is restricted daily from 10:00pm to 6:00am in the winter season for snow removal operations. 

Learn more about avalanche conditions outside of resort boundaries and #KnowBeforeYouGo by checking the Utah Avalanche Center daily avalanche forecast.