Famous route

Going-to-the-Sun Road

The road crosses Glacier National Park over Logan Pass. Motorhomes face a strict size limit on the central section, and the alpine part is open only in summer and early autumn.

State: Montana (Glacier National Park)
Length: About 50 miles
Suggested time: About 2 hours without stops
Top elevation: 6,646 ft (Logan Pass)
Best season: July to mid-October

What should you know before visiting Going-to-the-Sun Road?

No toll roads expected for a car. Mountain passes: Going-to-the-Sun Road (Logan Pass) (2,026 m, usually open July–September). Size limits for motorhomes: Going-to-the-Sun Road, Glacier NP (MT) (length 20 ft 12 in (6.4 m), height 10 ft 0 in (3.1 m)).

Vehicles longer than 21 ft (including bumpers) or wider than 8 ft (including mirrors) are banned between Avalanche and Rising Sun. Most large motorhomes do not fit.
The alpine section around Logan Pass is usually fully open by early July and usually stays open until the third Monday of October, weather permitting.
There is no fuel inside the park. Fill up before entering from either side.

The drive

The road runs about 50 miles between the West Entrance and the St. Mary Entrance. It passes Lake McDonald, climbs to Logan Pass at 6,646 ft and descends along St. Mary Lake. Without stops it takes roughly 2 hours, but most visitors plan far more time for pullouts and trails. Speed limits are about 40 to 45 mph in the lower parts and 25 mph in the alpine section. Vehicles taller than about 10 ft may have trouble west of Logan Pass because of rock overhangs. Drive carefully at dusk and at night, when wildlife is on the road.

Planning

Rules change from year to year, so check the National Park Service pages for Glacier before leaving. In 2026 no vehicle reservation was required in the park, and a ticketed shuttle ran between Apgar, Lake McDonald Lodge, St. Mary and Rising Sun in summer. In summer, parking at Logan Pass is limited to three hours, overnight parking there is generally not allowed, and the lot fills early. Large motorhomes are better left at a campground or lodging outside the restricted section, using the shuttle for the pass.

FAQs

Can I drive a motorhome over Going-to-the-Sun Road?

Only if it is no longer than 21 ft including bumpers and no wider than 8 ft including mirrors. The limit applies between Avalanche and Rising Sun. Measure the vehicle first and check the park's road page.

When is the whole road open?

The lower sections are open year-round. The alpine section has no fixed date because it depends on snow and plowing. It is usually fully open by early July and usually until the third Monday of October.

Is there fuel along the road?

No. The park has no gas stations, so fill the tank before you enter. The nearest towns on both sides of the park are the usual places to refuel.