Do I Need Chains on SR-88?

During R1, AWD/4WD with snow tires can proceed without chains. During R2, AWD/4WD with snow tires on all four wheels may pass. During R3, ALL vehicles must chain up. At 8,574 feet, Carson Pass is the highest major Sierra crossing — chain controls are frequent and conditions are severe.

Two chains minimum on your drive wheels. The steep, winding nature of SR-88 makes proper chain installation critical. Practice installing your chains before your trip — there's limited cell service on Carson Pass if you need help.

AutoSock is Caltrans-approved for R1 and R2 controls. During R3, traditional metal chains only. Given the extreme elevation and steep grades of Carson Pass, chains provide significantly better traction than fabric alternatives.

SR-88 over Carson Pass sees some of the heaviest snowfall in the Sierra, with chain controls common from November through April. The pass is higher than Donner or Echo Summit, so controls activate more frequently. Check live status at the top of this page.

R1: chains required except snow tires or AWD/4WD. R2: chains required except AWD/4WD with snow tires on all four wheels. R3: chains on ALL vehicles. SR-88 reaches R3 more frequently than I-80 or US-50 due to its higher elevation.

Eastbound checkpoints are typically at Pine Grove (Mile 38) or Ham's Station (Mile 58). Westbound controls start at Carson Pass (Mile 68) or near Kirkwood (Mile 72). Chain installer availability is limited — be prepared to install your own.

Check the live status above. SR-88 closes more frequently and for longer periods than I-80 or US-50 during major storms. For full route conditions, visit our SR-88 Road Conditions page.

Early morning is best, before afternoon storm activity increases. Avoid driving Carson Pass during active snowfall — the road is narrow and exposed at the summit. Weekdays see far fewer controls than weekends. Always check conditions before departing as SR-88 has limited cell service.