The Short Answer
If you're visiting Glacier Country and planning to drive Going-to-the-Sun Road, you need a timed vehicle permit for the peak-hour window in summer. Permits are released on recreation.gov each spring, and the main batch sells out within minutes. For everything else in Montana's parks, the bigger issue is campsite and lodge reservations, not timed entry.
Yellowstone requires no timed vehicle permit to enter. The three Montana entrances, through Gardiner, West Yellowstone, and Cooke City, stay open to paying visitors and you settle the fee at the gate. The hard part at Yellowstone is getting a campsite or in-park lodge room, which requires booking well ahead of your trip. Check the Montana Trip Cost and Budget guide for help factoring permit fees and entry costs into your overall spending.
Glacier's Going-to-the-Sun Road Permit System
Going-to-the-Sun Road crosses the Continental Divide at Logan Pass (6,646 feet) and runs 50 miles through the core of the park from Apgar on the west side to St. Mary on the east. It draws enormous summer traffic, and starting in 2021 the National Park Service began requiring timed vehicle permits for this corridor during peak hours. The system has changed in detail each year since, so check the NPS website for the current year's rules before booking anything. The broad structure has stayed consistent: a permit is required to drive the Going-to-the-Sun corridor during a set morning window.
The timed window has typically run roughly 6 a.m. to 3 p.m., though exact hours vary by season. The vehicle reservation fee is small, around $2 per vehicle as of recent seasons, on top of the 7-day park entry fee of $35 per vehicle. The America the Beautiful annual pass (currently $80) covers entry fees at every federal site in the country, including both Glacier and Yellowstone. It pays for itself if you're visiting two or more federal parks or monuments on the same trip. For guidance on when the road is open and what to expect by season, the Best Time to Visit Montana page has month-by-month detail.
Permits drop on recreation.gov in two waves: a main advance batch in spring (typically March, when the full summer calendar opens at once) and a rolling day-before or same-day release. The spring batch goes within minutes for busy July and August dates. The day-before release, which usually posts early in the morning, is a genuine second chance and worth checking if you missed March. Not every part of Glacier falls under the main permit zone. Many Glacier, on the northeast side of the park reached via US-89 through Babb, operates under a separate vehicle quota system. Two Medicine and the Cut Bank corridor are quieter and typically outside the timed-entry requirement altogether.
Glacier Campgrounds and Backcountry Permits
Campground reservations at Glacier are at least as competitive as the road permits. Apgar Campground (near the west entrance off US-2 east of West Glacier), Fish Creek Campground (on Lake McDonald), St. Mary Campground (east side off US-89), and Many Glacier Campground (the most remote of the four main developed campgrounds) all book up within minutes of opening on recreation.gov each spring. Standard campsite fees run approximately $23 to $35 per night (estimated range; verify current pricing on recreation.gov when you book). Cancellations come in regularly after the spring rush, so checking back every week or two before your trip is worth the effort.
Overnight backpacking anywhere inside Glacier's backcountry requires a permit. These are also issued through recreation.gov, with the same competitive March release window. The permit fee runs approximately $7 per person per night for backcountry camping (estimated rate; confirm on recreation.gov before booking). The Highline Trail from Logan Pass north toward Granite Park Chalet is one of the most requested routes, and those sites fill in the spring rush. If you're planning a multi-night trip, have a backup itinerary covering alternate zones. Before heading into the backcountry, read the Wildlife and Bear Safety guide: Glacier holds a significant grizzly population, and the rules for food storage and bear canister use apply across the entire park.
Yellowstone: No Timed Entry, But Book Lodging Far Ahead
Montana holds three of Yellowstone's five entrances. The North Entrance at Gardiner on US-89 is the only gate open to regular vehicles year-round. The West Entrance at West Yellowstone on US-20 and the Northeast Entrance through Cooke City via US-212 operate seasonally, with the West typically opening in late April or May and the Northeast running from late May through October or early November, depending on road conditions. Yellowstone does not currently require a timed entry permit. You pay the 7-day vehicle fee ($35 per vehicle, or use your America the Beautiful pass) at whichever entrance you use. Confirm current entry rules on the NPS website before your trip, since park policies do change.
The planning challenge at Yellowstone is lodging and campsites, not entry permits. In-park properties like Old Faithful Inn, Canyon Lodge, and Lake Yellowstone Hotel are managed by the park's concessionaire and open reservations for the following summer many months in advance. They sell out fast, often within the first days of opening. If you want to sleep inside the park, set a calendar reminder for when reservations open (check the NPS website for the current year's date) and book as soon as the window opens. Campgrounds at Yellowstone follow a similar pattern. The gateway towns of Gardiner, West Yellowstone, and Livingston (about 55 miles north on US-89) offer far more lodging availability, though they fill up in July and August as well.
Practical Tips
Set up a recreation.gov account before the March release dates. You don't want to be creating a login and entering payment information while permits sell out around you. Going-to-the-Sun Road typically opens fully from late June or early July through October, with the exact date depending on snow clearance that year. Arriving at the Apgar entrance before the morning timed window opens (often before 6 a.m., depending on current-year rules) can let you drive the road without a vehicle permit. The Montana Travel Guide covers logistics across all six regions of the state if you're planning stops beyond Glacier and Yellowstone. Free park shuttles connect Apgar and St. Mary to Logan Pass on a regular schedule and are a practical option if you can't land a road permit. For backcountry campers, remember that the per-person nightly permit fee is separate from the entry fee and the campsite fee: a four-person group spending three nights in the backcountry adds roughly $84 in permit fees alone (at the estimated $7 per person per night rate) before any other costs.
Frequently asked questions
Do I need a reservation to enter Glacier National Park?
No reservation is required simply to enter the park. But to drive Going-to-the-Sun Road during peak summer hours, you need a timed vehicle permit purchased on recreation.gov. The specific hours, dates, and any changes to the system update each year, so check the NPS website for the current season's rules before your trip.
When do Glacier National Park vehicle permits go on sale?
Recreation.gov typically opens the main batch of advance Going-to-the-Sun Road vehicle permits in March, releasing the full summer calendar at once. That window sells out within minutes for peak July and August dates. A smaller rolling release also opens 1 to 2 days before each date. If you miss the spring batch, check for day-before availability early in the morning on recreation.gov.
Does Yellowstone National Park require timed entry permits?
Yellowstone does not currently require a timed entry permit. You pay the standard 7-day vehicle entry fee ($35 per vehicle, or covered by an America the Beautiful annual pass) at the entrance gate. Confirm current rules at nps.gov before your trip. The bigger planning challenge at Yellowstone is in-park lodging and campsites, which require reservations well in advance.
Can I visit Glacier National Park without a Going-to-the-Sun Road permit?
Yes. The permit requirement covers only the Going-to-the-Sun corridor during the daily timed window. You can enter the park without a permit at any time, drive the road outside the timed window (check current-year rules for exact hours), or use the free park shuttle that runs from Apgar and St. Mary up to Logan Pass. Many Glacier, Two Medicine, and other sections of the park operate separately from the main permit zone.