Visiting Yellowstone National Park in December 2026: Roads, Snowcoaches, and What's Open

Lamar Valley in winter, photographed December 8, 2019. Main image: photo by NPS / Josh Spice, public domain, via Wikimedia Commons, cropped, with text added.

Yes, if you're happy to see a quieter, colder Yellowstone, and if you plan around the roads. In December you can't drive most of the park. You can drive from Gardiner through Mammoth to Lamar Valley, and from December 15 you can ride a guided snowcoach or snowmobile to places like Old Faithful. It's a great month for a short trip, and a poor one if Grand Prismatic, the Grand Canyon of the Yellowstone, and a loop drive are the whole point. My Yellowstone guide is built around summer roads, so treat this post as the winter edition.

Is December the Best Time to Visit Yellowstone?

It's the best time if you want empty boardwalks, snow on the terraces, and wildlife along a road you can actually drive. It's the worst time if you want a loop, a lodge at every stop, or long days. Most park roads closed to regular vehicles on November 1, and the West, South, and East entrances closed with them. NPS says the road from the North Entrance at Gardiner to the Northeast Entrance at Cooke City is the one road generally open to regular vehicles all year, weather permitting.

If you want the full Grand Loop, pick June through September instead. If you want snowcoaches, Old Faithful in the snow, and the guest rooms at Snow Lodge, go after December 15 and book early. If you want the cheapest, quietest version, stay on the north side. Coming from Jackson? The South Entrance is closed to cars, so read the Jackson day trip post before you plan on it.

Weather and Daylight in December

NPS says winter days in Yellowstone typically run from zero to 20°F, and its winter safety page warns that lows can reach -30°F. Plan for wind, ice on boardwalks, and conditions that change by the hour. Snow can close or slow the open road, so check conditions the morning you drive.

Daylight is short. At Mammoth the sun rises around 7:40 a.m. at the start of December and about 8:00 a.m. by the end, and it sets around 4:45 p.m. all month (approximate, calculated from the park's coordinates). That's about nine hours, and the good light for wildlife is at both ends of it. Plan to be back in town for dark.

What's Open and Closed, and Where You Can Drive

Roads. As of November 5, 2026, the park's road status page says most roads are closed to regular vehicles from early November to late April. The open road runs from Gardiner through Mammoth and Tower Junction up the Lamar Valley to Cooke City. Beyond Cooke City, the Beartooth Highway is closed for the season.

Oversnow travel. NPS has posted December 15 as the start of the guided snowmobile and snowcoach season, weather permitting, in its October 21 news release. Those vehicles are how you reach Old Faithful and the other interior roads in winter. If snow is thin, the date can slip, so treat it as the plan and not the promise.

A snowcoach at Snow Lodge, photographed December 21, 2019. Photo: NPS / Jacob W. Frank, public domain (NPS), via source.

Lodging and services. Mammoth Hot Springs Hotel and Cabins are open through early March 2027, per the park's operating dates page. Old Faithful Snow Lodge lists December 16 as its first winter day, and the Old Faithful and Canyon visitor education centers list December 15. Albright Visitor Center in Mammoth is open year-round, with winter hours of 8 a.m. to 5 p.m. through February 28, 2027. Mammoth Campground is the only campground I'd count on, and it's first come, first served in winter. Biscuit Basin stays closed because of hydrothermal explosion risk.

What to Book and When

Lodging is the booking that matters. Snow Lodge opens December 16, and winter lodging inside the park is limited, so book it as soon as you know your dates. Mammoth is easier, but the cabins without hot tubs aren't offered December through March, per the lodging operator, so look at the hot-tub cabins or the hotel. Check the oversnow tour operators for snowcoach seats too.

If you're thinking ahead to summer, December is when to start looking at campgrounds. My Madison Campground post explains how its Recreation.gov booking window works.

The Best Things to Do in December

Walk the Mammoth Hot Springs boardwalks. The terraces are steaming in the cold, and in December you can have them nearly to yourself. Drive east for the Lamar Valley, where you can stay in the car for most of your wildlife watching. Then add one big day: a snowcoach to Old Faithful, after December 15, is the way to see the geyser area without a car.

Skip long drives chasing the loop. A day that ends at dusk back in Gardiner or Mammoth beats three more stops in the dark.

Wildlife in December

NPS says to expect wildlife, including bears, bison, and wolves, at any time of year, and its winter safety page says to carry bear spray. Nothing is guaranteed. In NPS's own December photos from Lamar Valley and Mammoth, bison and coyotes turn up most.

A bull bison with a snow-covered face, photographed December 14, 2022. Photo: NPS / Addy Falgoust, public domain (NPS), via source.

The distance rules haven't changed: at least 25 yards from bison and elk, and at least 100 yards from bears and wolves, per the park's safety page. Stay in your car on the open road when animals are near the pavement, and don't stop in the lane.

Holidays, Events, and Crowds

There's no fee-free day in December. Entry is $35 per private vehicle, good for seven days, and snowmobiles pay $30, per the park's fees page. Crowds are thin until the snowcoach season starts, then expect more people around Old Faithful. The Mammoth General Store is closed on Christmas Day, so stock up on December 24.

Safety and What to Pack

Pack real layers, insulated boots, traction aids for icy boardwalks, a hat, goggles or sunglasses for snow glare, hand warmers, food, and water. Carry bear spray. Keep a full tank and a winter kit in the car, because the open road can close in a storm and help is far away. The park's winter safety page covers cold, ice, and thermal areas. Stay on boardwalks near thermal features.

How Many Days Do You Need in Yellowstone in December?

One day covers Mammoth and a drive into Lamar Valley, and that's a good first visit. Two days add a second pass at wildlife in the best light, or after December 15, a snowcoach day to Old Faithful. Three days work if you've booked Snow Lodge and want time at Old Faithful without rushing.

Pick one day if you're passing through Gardiner, two if you're staying in the north, and three only if you've booked oversnow travel. My Yellowstone guide has nine one- to three-day itineraries for the park in summer, which is a good way to see what you'd add on a second trip.

A One-Day Plan for December

• 8:00 a.m.: Coffee in Gardiner, then drive to Mammoth and walk the terraces while the light is low.
• 10:00 a.m.: Stop at Albright Visitor Center, then drive east toward Tower Junction.
• 11:00 a.m.: Lamar Valley pullouts for wildlife. Stay in the car near animals and use binoculars.
• 1:00 p.m.: Picnic lunch in the car or at a pullout, with something hot in a thermos.
• 2:30 p.m.: Second pass through the valley, then back toward Mammoth.
• 4:00 p.m.: Be on the road home before dark, around 4:45 p.m.

Before you go: see Yellowstone National Park alerts and current conditions, checked daily, for current closures and what they mean for your trip.

For more on how the park splits across a day, two days, or three, the Yellowstone National Park guide has the full plans.

This is an independent guide. It is not affiliated with or endorsed by the National Park Service. Conditions change; check the park's current alerts before you go.