Yellowstone Road Closures: Spring Plowing and Fall Shutdown Dates Explained
By Bozeman Proper Staff
March 31, 2026 · 8 min read
Most Yellowstone roads close to regular cars in early November and reopen in stages from mid-April through late May. The one route you can usually drive all year is Gardiner to Cooke City through Mammoth and Tower Junction. If you are coming from Bozeman, that means a March trip is a north-side trip, a late-April trip is still partial, and your “we’ll just drive the full loop in October” plan can fall apart fast.
Need the full trip plan too? Start with our Bozeman to Yellowstone planning guide, then use this post for the road calendar.
The rule that trips people up
The mistake is thinking “Yellowstone is open” means the whole park is drivable. It does not.
As of March 30, 2026, the National Park Service says the only road generally open year-round to regular vehicles is the route from the North Entrance through Mammoth to the Northeast Entrance. That is the Gardiner to Cooke City corridor, and it is the road that gets you to Mammoth Hot Springs, Tower Junction, Lamar Valley, and Cooke City.
Everything else closes to regular cars in winter. Some of those roads reopen for guided snowcoaches and snowmobiles from mid-December to mid-March, but that does not help you if you are driving a rental SUV from Bozeman and expecting to reach Old Faithful in March. You will not.
The 2026 Yellowstone road opening calendar
Yellowstone has now posted its projected 2026 road dates. They are still weather-dependent, but they give you the planning spine you need.
| Road segment | 2026 regular vehicle dates |
|---|---|
| North Entrance to Northeast Entrance | Open year-round |
| West Entrance to Madison, Madison to Old Faithful, Madison to Norris, Mammoth to Norris, Norris to Canyon | April 17 to October 31 |
| East Entrance to Fishing Bridge, Canyon to Bridge Bay | May 1 to October 31 |
| South Entrance to West Thumb, West Thumb to Old Faithful, West Thumb to Lake, Tower-Roosevelt to Tower Fall | May 8 to October 31 |
| Canyon to Tower Fall (Dunraven Pass) | May 22 to October 12 |
| Beartooth Highway and Chief Joseph Scenic Byway | May 22 to October 12 |
Two dates matter more than the rest.
April 17, 2026 is when the west-side network is projected to open. That gets regular cars from West Yellowstone to Madison, Old Faithful, Norris, Canyon, and Mammoth.
May 22, 2026 is when the high-elevation pieces are projected to come back. That includes Dunraven Pass and the Beartooth Highway. Before that, the park is still open in pieces, not as one clean loop.
What spring plowing actually means from Bozeman
Late April is where people get burned. They see one Yellowstone road-opening headline, book a West Yellowstone hotel, and assume the whole park is ready. In reality, spring plowing opens Yellowstone like a zipper, not a switch.
Before April 17, drive from Bozeman to Gardiner and treat Mammoth plus Lamar as your trip. That is still worth doing. Wildlife is excellent, crowds are low, and you can pair it with a shoulder-season stay in town. If you are coming in that window, read our Bozeman mud season guide too, because late-April Bozeman has its own “what is actually open?” problem.
From April 17 through April 30, the west side may be open to regular cars, but the park is still in an awkward in-between state. The south entrance stays closed until May 8. Dunraven Pass stays closed until May 22. And not every service comes back the day the pavement does. The Old Faithful Visitor Education Center is scheduled to reopen April 17, but Old Faithful lodging and the main dining room do not return until April 24. Tower-Roosevelt services lag even more, with the gas station, cabins, and dining room not scheduled until June 5.
Here is the Bozeman version of the calendar:
| If your trip starts in Bozeman… | What is realistically drivable |
|---|---|
| March to April 16 | Gardiner, Mammoth, Lamar, Cooke City |
| April 17 to April 30 | North side plus the west-side geyser corridor, weather permitting |
| May 1 to May 7 | Add east-side access toward Fishing Bridge, but not the south entrance yet |
| May 8 to May 21 | Most major corridors are open, but Dunraven Pass is still shut |
| May 22 onward | Full regular-vehicle network usually in play |
If you want Old Faithful, Grand Prismatic, and a relaxed same-day drive from Bozeman, wait until after April 17 at a minimum. If you want the cleanest, least-annoying road setup, wait until after May 22.
Fall shutdown dates are less forgiving than people think
Fall feels easier because the roads are already open. That is exactly why people get lazy about checking status.
For 2026, Yellowstone projects most regular-vehicle roads to stay open through October 31. But the high stuff closes earlier. Dunraven Pass is scheduled to close on October 12, 2026. The Beartooth Highway and Chief Joseph Scenic Byway are also projected to close on October 12, 2026, and those dates can move if winter shows up early.
November is the hard reset. Once the fall shutdown arrives, regular cars are back to the north-side corridor only. If you are building a Bozeman trip around Lamar wildlife, that is fine. If you are building it around a grand scenic loop through Old Faithful, Lake, Canyon, and Beartooth, late October is already a gamble and early November is a bad bet.
My opinion on this one is simple: late September through the first week of October is the sweet spot. Elk are bugling, crowds drop, and you still have a real shot at full-road access. Push later than that and you need to be flexible, not hopeful.
The 2026 delay nobody from Bozeman should ignore
The other thing that matters this year is not a closure. It is construction.
Yellowstone says the Gardner River High Bridge project near Mammoth will cause single-lane traffic with up to 15-minute delays, 24 hours a day, seven days a week, from April 1 through late October 2026. There will also be five full nighttime closures from 9 p.m. to 4 a.m. between late May and July 1. If you are using the north entrance from Bozeman, this is on your route.
That means your “90-minute drive to Gardiner” math may still be fine, but your “I can leave Mammoth late and still be back in Bozeman before dark” math gets shakier. Yellowstone is also warning about parkwide chip sealing with up to 30-minute delays in various locations through 2026. Build slack into the day. Yellowstone punishes tight schedules.
How to check road status without guessing
Do not trust a blog post from last spring. Not even this one, once the season starts moving. Use the official tools the week of your trip and then check again the night before.
- The Yellowstone park roads page has the current live map and the projected opening dates.
- The recorded road-status phone line is
307-344-2117. - Yellowstone road alerts can be sent to your phone by texting
82190to888-777. - The park also publishes webcams for the North and West entrances, which are genuinely useful when you are trying to judge traffic and weather.
- If you are heading toward Cooke City or Beartooth, check Montana DOT and Wyoming DOT too. Outside-the-park closures can ruin the plan just as fast as the gate can.
Once you know what roads are open, pair that with one of our Yellowstone day trip itineraries from Bozeman. The road calendar matters more than your hotel address, and it definitely matters more than what Google Maps says in February.
Frequently asked questions
Which Yellowstone road stays open all year?
The road from the North Entrance at Gardiner through Mammoth and Tower Junction to the Northeast Entrance near Cooke City is the one route generally open year-round to regular vehicles.
When do Yellowstone roads reopen in spring 2026?
The big spring reopening starts on April 17, 2026, when the west-side network is projected to open. More roads open on May 1 and May 8, and the final high-elevation pieces like Dunraven Pass and Beartooth are projected for May 22.
When do Yellowstone roads close in fall 2026?
Most regular-vehicle roads are projected to stay open through October 31, 2026. Dunraven Pass, the Beartooth Highway, and the Chief Joseph Scenic Byway are projected to close earlier, on October 12, 2026.
Is late April too early for Yellowstone from Bozeman?
It depends on what you want. Late April is fine for Mammoth, Lamar, and usually the west-side geyser corridor once the April 17 opening happens. It is too early if your plan depends on the full park loop, the south entrance, Dunraven Pass, or full summer services.
