Closures & Powder Days
When the Road Closes
on a Powder Day
The storm that makes the skiing worth it is the same storm that shuts the interstate. Here is what happens next, from the operator's side of it.
When I-70 closes in the Colorado mountain corridor — most often at the Eisenhower–Johnson Tunnel at 11,158 feet or on Vail Pass at 10,662 feet — closures typically last 60 to 90 minutes for crashes and avalanche mitigation, occasionally longer. Arion checks conditions before departure, adjusts the route en route at the chauffeur's discretion, and does not cancel your booking; there is no vehicle swap and wait time is included.
Why this corridor closes and the alternates do not help
Interstate 70 from Denver to Glenwood Springs is a two-lane-each-way mountain highway carrying an entire state's ski traffic through two high points and a canyon. The chokepoints are consistent:
- The Eisenhower–Johnson Memorial Tunnel, 11,158 feet. A crash inside or on either approach stops everything, because there is no shoulder to work with.
- Vail Pass, 10,662 feet. Steep grades on both sides, frequent spun-out trucks, and regular avalanche-mitigation closures.
- Glenwood Canyon. Rockfall and mudslide closures, mostly a summer and shoulder-season problem, and the longest detours in the state when it happens.
The alternates are worse in the same weather. Loveland Pass, US-6 over the top of the tunnel, is higher, has no guardrail in places, and closes first. US-24 over Tennessee Pass is longer and higher. The honest position is that on this corridor there is often no detour, only a wait.
What a closure actually looks like in time
The distribution matters more than the average. Most closures clear inside 90 minutes, which is precisely why a two-hour departure buffer works and a thirty-minute one does not.
The Traction Law, in plain terms
Colorado activates a Traction Law on this corridor for most of the winter. It requires that a passenger vehicle have either four-wheel or all-wheel drive, or snow tires, or chains, with a minimum tread depth of 3/16 of an inch. A Passenger Vehicle Chain Law is a further step and is rare — it usually accompanies conditions bad enough that a closure follows anyway.
Vehicles run state-approved winter tires and four-wheel drive, which satisfies Colorado's Traction Law without chains; two-wheel-drive vans and buses carry the traction devices the state requires. Chauffeurs are asked to carry a cold-weather kit — flares, triangles, solar blankets, water, food.
Fines apply, and they rise sharply if a non-compliant vehicle blocks the road. This is the practical argument against driving a rental sedan on all-seasons to Vail in February: not the ticket, but being the vehicle that closes the pass.
More detail on our Colorado Traction Law guide.
What we do with your booking when the road shuts
This is the part worth writing down, because it is where operators differ.
- Before departure the chauffeur checks CDOT conditions. If the road is already closed we tell you and we agree a plan — leave anyway and stage, or wait.
- En route the route is adjusted at the chauffeur's discretion where an adjustment exists, and you are told what changed and why rather than silently re-routed.
- During a closure we wait it out with you. There is no vehicle swap, no reassignment, and no meter anxiety — the booking is hourly and the vehicle is yours.
- We never cancel your ride because conditions look bad. If you want it cancelled, tell us.
For airport arrivals a closure is a non-event: you arrive later and the ride waits. For departures it is the whole risk, which is why the buffer exists.
Powder-day traffic, which is a separate problem
A big overnight sends every Front Range skier west on the same morning. Westbound I-70 from about 6 to 10 a.m. after a storm is heavier than a normal Saturday, and eastbound from 11 a.m. to 7 p.m. on the way home is the worst recurring traffic in Colorado.
Nothing about a private vehicle skips that queue. What it does buy you is the ability to leave at 5 a.m. without anyone having to be the designated driver at the end of it, and to leave at 7 p.m. after dinner rather than sitting in the 2 p.m. wall.
Check before you go: CDOT COtrip for live status and scheduled mitigation windows.
Planning around it rather than hoping
Cancellation terms are the same on every booking: full refund at 48 hours or more, up to 50% inside 48 hours, nothing inside 24. Tours run on a 7-day window.
Work runs on Arion's own vehicles and on Arion-trained 1099 affiliate chauffeurs and vetted Colorado PUC-certified operators, depending on the date and the vehicle. Every one of them carries a PUC permit and commercial insurance, and every one is dispatched and answered for by Arion. Colorado PUC permit LL-04689, $1.5 million commercial auto liability, $5 million general liability.
Questions we get asked
How long do I-70 closures usually last?
Most clear inside 60 to 90 minutes — scheduled avalanche mitigation runs 30 to 90 minutes and a crash or spun-out truck is typically 60 to 90. Multi-hour closures happen but are the exception.
Where does I-70 close most often?
At the Eisenhower–Johnson Tunnel at 11,158 feet and on Vail Pass at 10,662 feet. Glenwood Canyon closes too, mostly for rockfall and mudslides outside deep winter.
Is there a detour when I-70 closes?
Usually not a useful one. Loveland Pass is higher and closes first; US-24 over Tennessee Pass is longer and higher. On this corridor the realistic option is often to wait.
What is the Colorado Traction Law?
A requirement that passenger vehicles on designated corridors have four-wheel or all-wheel drive, snow tires, or chains, with at least 3/16 inch of tread. A Passenger Vehicle Chain Law is a further, rarer step.
Do your vehicles comply with the Traction Law?
Yes. State-approved winter tires and four-wheel drive, so a Traction Law activation does not stop the trip. Two-wheel-drive vans and buses carry the traction devices the state requires.
Will you cancel my ride if the road closes?
No. We wait it out with you. There is no vehicle swap and no cancellation from our side, and waiting time is included in the hourly booking.
What does the driver do if a closure happens mid-trip?
Adjusts the route where an adjustment exists, at the chauffeur's discretion, and tells you what changed and why. If there is no route, we wait.
How do I check road conditions myself?
CDOT's COtrip site and app show live closures, Traction Law status and scheduled avalanche mitigation windows. It is worth a look before any winter mountain departure.
When is I-70 traffic worst on a powder day?
Westbound roughly 6 to 10 a.m. the morning after a storm, and eastbound 11 a.m. to 7 p.m. on the way home. A private vehicle does not skip the queue; it lets you travel outside it.
Should I leave the mountains the night before a flight?
If the forecast is serious, yes. Overnighting near the airport converts an uncontrollable risk into a hotel bill, and we will say so when we think it applies.
Are closures worse on the way up or the way down?
The consequences are. An arrival that is delayed simply arrives later and the ride waits. A departure that is delayed misses a flight, which is why we add a two-hour winter buffer to departures.
Do you drive in whiteout conditions?
The chauffeur makes that call, and it is one of the few decisions we do not override from dispatch. If the safe answer is to stage somewhere and wait, that is what happens.
Sources
- CDOT COtrip — live I-70 conditions, closures and Traction Law status
- CDOT — Traction and Passenger Vehicle Chain Laws — vehicle requirements on Colorado mountain corridors in winter
- Colorado Public Utilities Commission — Transportation permits — regulation of luxury limousine and charter carriers in Colorado
Book it anyway.
The vehicle is yours, closure or not. (970) 703-4995.
Last reviewed: August 24, 2026 by Arion dispatch. Rates, policies and Colorado Department of Transportation rules are subject to change; call (970) 703-4995 for current details.