RV Guide to Glacier National Park: Size Limits, Routes & Tips
21-foot size limits, five dump stations, no fuel inside the park — the essential RV logistics and 2026-specific rules for Glacier National Park.
RVs over 21 feet cannot drive the restricted alpine section of Going-to-the-Sun Road — but you can still explore every corner of Glacier by combining US Highway 2 with the right campgrounds, dump stations, and route planning. This guide covers every size limit, campground restriction, 2026 policy change, and practical logistics you need before you arrive.
- 21 ft Going-to-the-Sun Road length limit
- 8 ft width limit (mirror-to-mirror)
- 56 mi US Highway 2 south-boundary route
- 5 dump stations in park
Going-to-the-Sun Road Size Limits — Full park route
Critical to knowThe alpine middle section has three hard rules: 21 feet long, 8 feet wide, 10 feet high advisory — measure at home or Rangers will turn you around.
- West entrance (West Glacier to Avalanche Creek) and east entrance (St. Mary to Rising Sun) have zero size restrictions
- Mirror width is the most missed rule — measure mirror-to-mirror with mirrors fully deployed; this counts toward the 8-foot limit
- Common mistake: arriving at Avalanche Creek in an oversized rig with no backup plan — Rangers will turn you around with no easy reversal point
- Height restriction is advisory (rock overhangs west of Logan Pass) — not a hard closure, but low-clearance rigs should heed it
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.
US Highway 2: The Large-RV Cross-Park Route — South boundary
Best for large RVs56 miles along Glacier's entire southern boundary from West Glacier to East Glacier Park — approved for semi-trucks and any size RV, no restriction headaches.
- US Highway 2 is the primary cross-park route for large RVs over 21 feet
- Route follows the Middle Fork of the Flathead River with approved semi-truck access, so any size RV travels it without issue
- Towns along US-2 are your primary fueling windows — zero fuel inside the park
- The full west-to-east RV loop: West Glacier → US Hwy 2 → East Glacier Park → US Hwy 89 north → St. Mary → Many Glacier, approximately 90 miles and 2 hours
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 and accessible to RVs up to 35 feet with careful driving on narrower sections.
Campgrounds: RV Size Limits by Site — West side & east side
Book immediatelyAll in-park campgrounds have zero hookups, but RV-friendly sites range from 21 ft (Sprague Creek, Rising Sun) to 40 ft (Apgar select sites). Book early on Recreation.gov.
- Apgar (west): 40 ft select sites, 25 ft most; 25 RV sites; dump station; opens ~May 22
- Fish Creek (west): 35 ft max; 18 RV sites; dump station; opens ~May 22
- St. Mary (east): 40 ft (3 sites), 35 ft (22 sites); 25 total sites; dump station; open year-round with partial fall closure
- Many Glacier (east): 35 ft limit, only 13 of 109 sites; dump station at entrance; open year-round
Avalanche (limited sites, 26 ft max, opens ~July–Sept, no dump confirmed) and Rising Sun (21 ft max, first-come, dump station, east side) fill extremely fast. Sprague Creek is motorhomes-only at 21 ft with NO towed units permitted. 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 confirmed dump station; Many Glacier is the best east-side base.
Fuel Before Entry: Zero Gas Inside the Park — Gateway towns
Non-negotiableThere is no fuel station anywhere inside Glacier National Park. Fill up completely at West Glacier, Columbia Falls, St. Mary, Babb, or East Glacier Park before you enter.
- West Glacier village: fuel on the access road before west entrance
- Columbia Falls (~10 mi west on US-2): ~15 minutes from Lake McDonald/Apgar area
- St. Mary village: fuel at the east entrance
- Babb, MT (US-89): ~9 miles south of Many Glacier
- East Glacier Park village: fuel at the US-2 junction for south-boundary travel
Calculate full-loop mileage and add a 20% buffer. 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.
Driving Going-to-the-Sun Road: The Alpine Section — Avalanche Creek to Rising Sun
Size-dependent decision50 miles of switchbacks with a 25 mph speed limit and infrequent pullouts — if you're under 21 ft/8 ft, the views justify the tight driving; if not, ride the shuttle instead.
- Rangers check vehicle dimensions at Avalanche Creek (west) and Rising Sun (east) during peak season
- Pullouts are narrow on the alpine section even for compliant vehicles under 21 ft — westbound traffic has the inside lane; eastbound vehicles hug the outer edge with no guardrail
- If your RV exceeds the limits, drop and park at: Avalanche Creek (largest pull-off), Lake McDonald Lodge area (RV-accessible lot with shuttle), Rising Sun (dump station + parking + shuttle), or St. Mary Visitor Center (ample parking, east-side shuttle)
Do not attempt the alpine section in an oversized rig — there is no viable turnaround point once you're committed to the switchbacks. GTSR's alpine section typically opens in late June and closes in October. Check current status at NPS.gov before driving — late snowfall causes day-of closures.
Logan Pass Shuttle & 2026 Policy Changes — Multi-stop access
Essential for oversized RVsFree entry fee with $1 processing charge; 60-day rolling booking window opens May 2; 3-hour parking limit starting July 1; no stops at Avalanche Lake or Trail of the Cedars in 2026.
- Book via Recreation.gov or 877-444-6777; advance window opens 60 days out, first release May 2 at 8 a.m. MDT
- Day-of tickets released 7 p.m. MDT the prior evening, starting June 30
- West-side departures: Apgar Visitor Center, Lake McDonald Lodge; east-side departures: St. Mary Visitor Center, Rising Sun
- Shuttles will NOT stop at Avalanche Lake or Trail of the Cedars in 2026 — those trailheads require driving to Avalanche Creek parking before the size restriction begins
Logan Pass (6,646 ft) is the park's most photographed viewpoint and previously inaccessible to oversized RVs. The 2026 change to a ticketed shuttle with a 3-hour parking limit starting July 1 reflects visitor volume management. The timed-entry vehicle permit system (2021–2025) was discontinued — no advance park entry reservation is needed in 2026.
Dump Stations: Five Park Locations — Strategic stops
Essential for staysFive confirmed dump stations at Apgar, Fish Creek, Many Glacier, Rising Sun, and St. Mary — match them to your campground rotation for efficient tank management.
- Apgar Campground: Going-to-the-Sun Hwy, Apgar Village; potable water; (406) 888-7800
- Fish Creek Campground: Camas Creek Rd, west side; (406) 888-7800
- Many Glacier Campground: at campground entrance, east side; potable + non-potable rinse water
- Rising Sun Campground: Going-to-the-Sun Rd, east side; (406) 888-5441
- St. Mary Campground: US Hwy 89 / Going-to-the-Sun Rd junction, also on US-89 ~33 miles NW of Browning
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. Whitefish (18 miles west) and Columbia Falls (10 miles west on US-2) have commercial dump stations and propane fills — useful for longer stays or if arriving before in-park stations open for the season.
Common Questions
Can I drive my RV on Going-to-the-Sun Road?
Only if your RV is 21 feet or shorter (bumper-to-bumper) and 8 feet or narrower (mirror-to-mirror). The restriction applies to the middle section from Avalanche Creek to Rising Sun. The west entrance (West Glacier to Avalanche Creek) and east entrance (St. Mary to Rising Sun) have no size limits.
Does Glacier National Park have RV hookups?
No. Zero campgrounds in Glacier offer water, sewer, or electrical hookups. All sites are primitive. Dump stations are available at Apgar, Fish Creek, Many Glacier, Rising Sun, and St. Mary campgrounds.
Do I need a reservation to enter Glacier National Park in 2026?
No vehicle reservation is required to enter the park in 2026. The timed-entry permit system used from 2021–2025 was discontinued. You still need campsite reservations via Recreation.gov, and Logan Pass shuttle tickets are required to ride to the summit via the shuttle system.
What is the best RV campground in Glacier National Park?
Apgar Campground (west side) is the most RV-friendly: select sites up to 40 ft, a confirmed dump station, and proximity to Lake McDonald and the west entrance. Fish Creek is the second-best option with 35 ft max sites and a dump station. For the east side, Many Glacier has 13 RV-suitable sites with a dump station at the campground entrance.
Sources & Further Reading
- NPS.gov — Going-to-the-Sun Road Vehicle Size Limits — NPS
- NPS.gov — Glacier Directions & Fuel — NPS
- NPS.gov — Reservation Campgrounds — NPS
- NPS.gov — Logan Pass Shuttle 2026 — NPS
- NPS.gov — Vehicle Reservations 2026 — NPS
- NPS.gov — 2026 Construction Updates — NPS
- Recreation.gov — Glacier Campgrounds & Logan Pass Shuttle — Recreation.gov
- SaniDumps — Glacier National Park Dump Stations — SaniDumps
