Best Time To Visit in Yellowstone

Apr–May

The transition window — and the one to check road status before you commit a route, since the interior loop opens in mid-April and the rest of the roads follow on a staggered, weather-dependent schedule into late May. The draw is wildlife: bears emerging from their dens, elk and bison following the green-up to lower ground, and the Lamar Valley wolf packs still active before they disperse for summer. Crowds are light by summer standards, but in-park lodging only starts reopening in May — book deliberately.

What's open: Spring road-opening is staggered and weather-dependent; the core interior loop typically opens in mid-April (April 17 in 2026), with the East Entrance, the South Entrance, and Dunraven/Beartooth following late April through late May (May 22 in 2026); only the North Entrance to Cooke City road stays open year-round to regular vehicles; Old Faithful Inn opens May 1; campgrounds open on a staggered April 27 through June 15 schedule.

Jun–Aug

The one stretch of year every road, every geyser basin, every lodge, and every ranger program is running. June through Labor Day is the busiest window; arrive at an entrance before 7 a.m. or after noon, and avoid Old Faithful and the Grand Canyon of the Yellowstone parking lots between 10 a.m. and 4 p.m. Bison rut in Hayden and Lamar valleys runs late July through August — large herds visible from the road, with NPS-required wildlife distances enforced. Afternoon thunderstorms build over the high country most days of July and August, and wildfire smoke can move in from regional fires in August.

What's open: All park roads open by Memorial Day weekend; all lodges, campgrounds, and visitor centers operating; no timed-entry or vehicle reservation in 2026; entrance station waits routinely exceed an hour midday; afternoon thunderstorms and wildfire smoke common July through August; Boiling River swimming closed indefinitely since the 2022 floods.

Sep–Oct

The window many regulars protect. Elk rut runs early September through mid-October — bull elk bugling at dawn and dusk around Mammoth, Madison Canyon, and the northern range — and crowds drop sharply after Labor Day. The trade-off is access shutting down: drive Dunraven Pass and the Beartooth Highway early in the window before they close in mid-October, and book lodging carefully as the in-park lodges close on a rolling October schedule. A hard cold snap can shut a road any time from late September on.

What's open: Most roads open into early November; Dunraven Pass and Beartooth Highway close in mid-October (October 12 in 2026); lodges close on a rolling October schedule (Grant Village October 10, Lake Yellowstone October 11, Old Faithful Inn October 12, Canyon Lodge October 25); visitor centers open through October 31; ranger programs scale back after Labor Day.

Jan–Mar · Nov–Dec

Yellowstone shrinks to its snowcoach-and-skier core. Most of the interior is oversnow-only for the winter — Old Faithful and the Grand Canyon of the Yellowstone are reachable only by guided snowcoach, guided snowmobile, or a non-commercially-guided permit. The one exception is the plowed North Entrance-to-Cooke City road, which threads Lamar Valley — the best place in the park to watch the northern wolf packs at dawn and dusk through the cold months. Decide your access mode before you come: this is a guided-oversnow trip or a stay-on-the-north-road trip, not a drive-the-loop one.

What's open: Most park roads closed to wheeled vehicles November through mid-April; oversnow travel (snowcoach and snowmobile) opens around December 15 and runs through mid-March; the North Entrance to Cooke City road stays open to cars year-round; Mammoth Hot Springs Hotel open through early March; Old Faithful Snow Lodge open mid-December through early March; Albright Visitor Center and Mammoth Campground open year-round.