Going-to-the-Sun Road: Montana Driving Guide

The drive

This west-to-east road crossing links the West Glacier area with St. Mary through Glacier National Park. It follows Going-to-the-Sun Road, not park trails or a bypass around a closed alpine section.

The distance shown is measured along this specific connected road trace. It excludes your approach to the starting point, sightseeing spurs and any return journey. Inspect the endpoints and map before deciding whether it fits your trip.

This is an untimed planned road itinerary reconstructed from licensed OpenStreetMap road nodes, not a recording of a completed drive. Road-node connectivity and mapped driving direction have been checked; live access, unmapped restrictions and road-surface conditions are not guaranteed.

RevScore: this route's curviness

How these planning facts were checked

The OSRM car-routing model was checked against 100 points along this exact GPX, including its loop or segment shape—not simply the fastest route between the endpoints. The 2 h 10 min–3 h 20 min range uses rounded planning allowances of 15–75% above the model's no-live-traffic baseline. These allowances are not measured traffic statistics or a guarantee; allow extra time for lunch, photographs and other stops.

Terrain elevations were sampled at 100 points along the GPX using the USGS NED approximately 10-metre terrain dataset hosted by Open Topo Data (dataset snapshot: April 23, 2020). The displayed range is rounded to 50 feet / 10 metres. It is an approximate sampled range—not an exact road minimum/maximum, summit height or cumulative elevation gain. Terrain can differ from the road surface around tunnels, bridges and road cuts.

Facts checked October 21, 2026. Sources are linked under “Guide sources.” The original GPX remains an untimed map trace; these modeled facts are not recorded-drive measurements.

Driving notes

1. Respect road users and local communities

   Observe posted limits, allow safe passing and use designated stopping places. RevScore describes route geometry; it is not an invitation to drive faster.

2. Inspect the exact segment

   Going-to-the-Sun Road near West Glacier to Going-to-the-Sun Road at St. Mary. A matching road name alone does not mean a downloaded file covers every part of the road.

Places along the route

• Going-to-the-Sun Road near West Glacier

  Mapped starting area; arrange legal parking and supplies separately.

• Going-to-the-Sun Road at St. Mary

  End of this one-way trace. Plan onward travel or a return separately.

Cautions

• Check official access before departure

  The alpine crossing closes seasonally. NPS says the full road does not usually open before late June and alpine sections typically close around the third Monday of October, sometimes earlier. Vehicles longer than 21 feet (including bumpers) or wider than 8 feet (including mirrors) are prohibited between Avalanche Creek and Rising Sun; vehicles over 10 feet high may have difficulty beneath rock overhangs. NPS says vehicle reservations are not required in 2026; entrance fees and all closures still apply. Check current NPS conditions and future-year rules separately.

Questions drivers ask