Passenger vehicles are required to have mud or snow tires or use chains or alternative traction devices or be a four wheel drive or all wheel drive vehicle.
Commercial vehicle chain law
I-70 westbound between C-470 (1 mile west of Golden) and CO 103 (Idaho Springs) from Mile Point 259 to 241. Chain law applies to westbound only. Find updates at
Passenger vehicle traction law
US 285 in both directions between County Road 35 (14 miles north of Fairplay) and Wandcrest Avenue (8 miles south of Aspen Park) from Mile Point 198 to 228.5. Find updates at