At a Glance
- Traction Law: CO law, Oct–May
- US-550 Status: Check CDOT 511
- Red Mountain Pass: 11,018 ft, avalanche zone
- 4WD Roads: Closed Nov–May typically
- Chains Required: Possible on US-550
Colorado's Traction Law — What You Need
Colorado's Traction Law requires vehicles on mountain highways to have winter tires (3PMSF rated) or all-season tires with at least 3/32" tread, plus the ability to carry chains. From October through May, driving US-550 in summer tires is both dangerous and illegal. Check your tire rating before you leave.
All-wheel drive or 4WD is strongly recommended for the Million Dollar Highway in winter conditions. The road can go from dry to packed snow in minutes as weather changes. Drive with extra following distance, use engine braking on descents, and never stop in traffic lanes to chain up — use designated pull-outs or turnouts.
The Million Dollar Highway in Winter
US-550 between Ouray and Silverton is one of Colorado's most avalanche-prone corridors. CDOT manages several avalanche paths along this stretch and occasionally closes the road for controlled blasting or natural avalanche hazard. Always check CDOT's 511 service (cotrip.org) before driving south from Ouray in winter.
The road is typically plowed and passable in adequate winter conditions, but it's narrow and unforgiving. Drive during daylight when possible. The shaded north-facing sections stay icy long after the sunny portions have dried. Keep your speed very low through the switchbacks above Ouray and near Red Mountain Pass.
Arriving in Ouray in Winter Conditions
The approach from Montrose on US-550 north is generally less challenging than the southern approach over Red Mountain Pass. From the north, the road descends into Ouray's box canyon — watch for ice in the shadowed canyon sections near town. The last mile into Ouray involves a descent with tight curves that ices over after dark.
Once in Ouray, the town is very walkable even in snow. Major streets are plowed regularly. Park your car at the Lumberyard Condos and leave it — nearly everything you need is accessible on foot. This eliminates most winter driving concerns for the duration of your stay.
Emergency Preparedness for Winter Mountain Driving
Always carry a winter emergency kit in your vehicle: wool blanket, extra layers, high-calorie snacks, water, a small shovel, jumper cables or jump starter, and a flashlight. If you get stuck or go off-road, these items can be lifesaving while you wait for help. Cell service is limited on mountain roads — don't count on immediately reaching emergency services.
Share your travel route and expected arrival time with someone before heading out. If US-550 closes, the alternate route via Montrose and Gunnison adds significant distance — build buffer time into your schedule. The Lumberyard Condos team can advise on current road conditions when you contact them directly at ouraycondos.com.