RV Guide to Glacier National Park: Size Limits, Routes & Tips

The largest RV allowed on Going-to-the-Sun Road is 21 feet long and 8 feet wide: vehicles and vehicle combinations longer than 21 feet, including bumpers, or wider than 8 feet, including mirrors, are prohibited between Avalanche Creek and Rising Sun. Confirm your RV's exact dimensions at home and decide your full route before you leave. Class A motorhomes, fifth-wheels, travel trailers over 21 ft, and most Class C rigs over 21 ft cannot drive the scenic alpine middle section. A truck camper can use the restricted section only if its measured vehicle stays within both limits; campground parking limits can still be different.

Going-to-the-Sun Road limits: vehicles and vehicle combinations longer than 21 ft or wider than 8 ft (mirror to mirror) are prohibited on the stretch from Avalanche Creek to Rising Sun, and NPS advises that vehicles over 10 ft tall may have trouble with rock overhangs.

Where can you drive a 25-foot RV in Glacier, including on a long-distance trip from places like Des Arc, Arkansas, or California? Use US Highway 2 around the park rather than the restricted Avalanche Creek–Rising Sun corridor — confirm your specific rig's dimensions and current route conditions before you go. East-side access from Great Falls: drive US Highway 89 north (~125 miles to Browning), then follow signs to St. Mary and Many Glacier. Many Glacier Road is paved, but check current road conditions and your rig's fit before driving its narrower sections.

US Hwy 2 is the large-RV route around the park: it follows the Middle Fork Flathead River between West Glacier and East Glacier Park, about 56 miles and roughly ~1 hr of driving with no size limit.

Avalanche (limited sites, up to 26 ft per site records, opens roughly July–Sept, dump status unconfirmed) and Rising Sun (up to 21 ft, first-come, dump station listed — check current status) fill extremely fast. Sprague Creek limits vehicles and combinations to 21 ft long and 8 ft wide, per the park compendium. Two Medicine Campground is closed for all of 2026 due to construction — do not include it in your 2026 route. Best west-side choice is Apgar for the largest sites and a listed dump station; Many Glacier is the best east-side base.

Calculate mileage for your planned route and carry a reasonable fuel reserve, since there are zero fueling stations inside the park. Larger rigs experience brake fade on long descents — downshift to engine-brake on grades over 6%. Alpine sections have a 25 mph speed limit; lower roads are 40 mph max.

RV parking within Glacier National Park is limited and lots fill early, so plan legal parking before you arrive — oversized rigs should not attempt the restricted alpine section of Going-to-the-Sun Road. GTSR's alpine section typically opens no earlier than late June and closes around October, with exact dates varying by snowpack — check current status at NPS.gov before driving; late snowfall causes day-of closures. The full length of Going-to-the-Sun Road was driven end-to-end several times in one August trip, in both directions — eastbound and westbound show different walls of scenery and different pullouts are accessible from each direction.

The alpine section is narrow, with switchbacks and pullouts, and the full road typically opens Late June to Oct depending on plowing and weather.

Going-to-the-Sun Road runs about 50 mi from West Glacier to St. Mary.

Logan Pass (6,646 ft) is the park's most photographed viewpoint and previously inaccessible to oversized RVs. The best parts of Logan Pass are the trails and destinations reachable from it rather than the pass itself. Glacier ran a ticketed shuttle with a 3-hour private-vehicle parking limit at Logan Pass from July 1 through September 7, 2026, as a pilot to manage visitor volume; that pilot has since ended. The timed-entry vehicle permit system (2021–2025) was discontinued — no advance park entry reservation was needed in 2026. Shuttle tickets were non-transferable during the pilot.

For the July 1 to September 7, 2026 pilot, private vehicles at Logan Pass were limited to 3 hrs of parking.

Shuttle tickets for the 2026 season sold on a 60-day advance window that opened May 2, plus a next-day release.

On a west-to-east loop, dump at Apgar or Fish Creek before departing the west side, then again at Rising Sun or St. Mary on the east side — confirm each station is currently operating before you rely on it. Gateway towns including Whitefish and Columbia Falls have commercial dump stations and propane fills; verify exact distances and hours before you go.

There are 5 dump stations inside the park; plan your holding-tank capacity around them rather than counting on hookups, which the park campgrounds do not have.