Current Conditions on Donner Summit

Interstate 80 Road Conditions

Interstate 80 over Donner Summit is open year-round, but conditions on the pass in the winter often cause temporary closures. For this reason, during the winter it is always prudent to check with CalTrans before setting out.

Road Condition Information

These are among the best contacts for road conditions:

• Caltrans current road conditions: 1-800.427.7623
• CalTrans Road Information
• Caltrans QuickMap - a very useful tool for locating chain controls and much more
• Caltrans Social Media Pick #3 for Donner Summit. Twitter, Facebook, etc.
• Caltrans Chain Controls and Chain Installations
• SigAlert - Donner Summit
• Caltrans mobile

A Soda Springs weather report is close enought to Boreal, Sugar Bowl, Donner Ski Ranch, and, of course, Soda Springs, to provide accurate weather information for the ski resorts. For more detailed snow reports from the ski resorts, see the links below to the individual resorts and their webcams.

Snow Chain Designations

Requirement One (R1): Chains or snow tread tires required. Snow tires must have a tread depth of 6/32" with a "M & S" imprint on the tire's sidewall.
Requirement Two (R2): Chains required on all vehicles except four-wheel drives or all-wheel drives with snow tread tires on all four wheels. (NOTE: four-wheel and all-wheel drive vehicles must carry traction devices in chain control areas)
Requirement Three (R3): Chains are required on all vehicles, no exceptions.