Motion Sickness: West Glacier to St. Mary Drive
The West Glacier to St. Mary trip covers about 50 miles (80 km) and takes around 2 hours. The terrain is mountain pass, which makes it a very high motion sickness risk route.
Glacier National Park's Going-to-the-Sun Road is only 50 miles but climbs over Logan Pass (6,646 feet) with continuous switchbacks and cliff-edge drops. The alpine section typically opens by mid July, and the park says opening dates cannot be predicted, so check road status before driving. Despite its short length, motion sickness symptoms are common, especially in backseat passengers and children.
In the Nausea Index table of the 46 road trips we cover, the West Glacier to St. Mary trip is rated notorious, one of 17 in the top band. Full table: the bumpiest road trips, ranked.
Key facts
- The West Glacier to St. Mary trip covers about 50 miles, which is 80 km.
- It takes about 2 hours.
- The terrain is mountain pass, which puts the route in the very high band for motion sickness.
- 3 sections are flagged as motion sickness pressure points, starting with The Loop switchback.
- Steadiest place to sit: Driver's seat.
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Where Motion Sickness Hits Hardest
The sections most likely to trigger motion sickness are: The Loop switchback, Logan Pass approach, Big Bend. Vehicles over 21 feet long or 8 feet wide are prohibited between Avalanche Creek and Rising Sun. Drive slowly - there are frequent pullouts. The full crossing can be done in under 2 hours but most travelers take 4 to 5 hours with stops.
Season and closures: The alpine section typically opens by mid July, and the park says exact opening dates cannot be predicted; check the park road status before you go. nps.gov
Measured bends
We counted every bend on this route from OpenStreetMap data: 80 km, ranked 15 of 26 road trips for bends per km.
- Bends
- 78
- Bends per km
- 0.97
- Hairpins
- 4
- Busiest 10 km
- 36 bends
Route facts, checked at the source
Each fact below was checked against the linked official or operator page.
- Length and drive time: West Glacier to St. Mary is 50 miles, 2 to 2.5 hours without stops. nps.gov
- Vehicle size limit: Vehicles longer than 21 feet or wider than 8 feet are prohibited between Avalanche Creek and Rising Sun; vehicles over 10 feet tall may have difficulty west from Logan Pass to the Loop. nps.gov
- Summit: Logan Pass is the highest point on the road at 6,646 feet (2,026 m). nps.gov
Where you can stop
Pullouts recur along the crossing; the park's 2 to 2.5 hour drive time assumes no stops, so build in resets at the marked pullouts instead of pushing through.
Best Seat for Motion Sickness on This Drive
Driver's seat.
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Prevention Tips for the West Glacier to St. Mary Drive
- Have Dizzout downloaded before you start, so it is ready the moment symptoms begin
- If you plan to take an over-the-counter tablet such as Bonine or Dramamine, those need 30 to 60 minutes before departure to do anything. Ask a pharmacist first
- Eat lightly before the drive; a heavy meal makes symptoms worse for most people
- Take breaks every 90 minutes minimum on long stretches
- Keep the car cool and well-ventilated
- Avoid reading or phone use in the back seat
Which of those actually hold up when they are tested is a separate question, and we keep the answers in one place: the remedy verdicts, ranked by evidence.
Frequently asked questions
How long does the Going to the Sun Road take to drive?
The park lists West Glacier to St. Mary at 50 miles and 2 to 2.5 hours without stops. Almost nobody drives it without stops. With pullouts, queues and photo traffic, budget 4 to 5 hours, and count the extra time as part of the plan; a hurried crossing is a queasy one.
When does the Going to the Sun Road open for the season?
Typically by mid July for the alpine section, per the National Park Service, which also says exact opening dates cannot be predicted; snow decides. Check the park's road status while planning and again the day you drive, and have a lower elevation alternative ready in early summer.
Can I drive an RV on the Going to the Sun Road?
Only a small one. The park prohibits vehicles longer than 21 feet or wider than 8 feet between Avalanche Creek and Rising Sun, and warns that vehicles over 10 feet tall may struggle under rock overhangs west of Logan Pass toward the Loop. Larger rigs stay below the restricted section.
What is the highest point on the Going to the Sun Road?
Logan Pass, at 6,646 feet, per the National Park Service. The climbs to it on either side hold the road's continuous switchbacks and cliff edge stretches, which is why symptoms cluster on the approach rather than at the top; the pass itself is the natural place to stop and reset.
Where can you pull over if someone feels carsick on the Going to the Sun Road?
Pullouts recur along the road, and the park's 2 to 2.5 hour figure assumes you are passing them by. Use them early: at the first yawn or silence from the back seat, take the next pullout, eyes on the mountains for five minutes. Short exposure with resets is how a very winding 50 miles stays manageable.
What's the fastest way to stop car sickness mid-drive?
Once symptoms have started, pills won't work fast enough - they take 30+ minutes to kick in. The fastest options mid-drive are sound therapy via headphones (Dizzout states relief in about 90 seconds), pulling over for fresh air, and looking at the distant horizon.
Other drives we have looked at
Route facts last checked September 2026. Roads, rules and seasons change; the linked official pages are the live word.