Road Conditions
Current US 395 & HWY 203 Conditions
Stay safe on your drive to Mammoth by checking road conditions before your trip. Conditions are variable and subject to change, so please check back frequently. For detailed information on chain controls, lane closures, and more, check out the CalTrans QuickMap.
395 CONDITIONS
203 CONDITIONS
Do I Need Chains?
Driving to Mammoth this winter? Learn when chains are required, what to keep in your car, and how to stay prepared whether you’re driving up from Southern California or already in town when the snow starts falling.