Motion Sickness: Denver to Aspen Drive
The Denver to Aspen trip covers about 200 miles (322 km) and takes around 4 hours. The terrain is mountain highway, which makes it a very high motion sickness risk route.
Denver to Aspen via I-70 and CO-82 climbs through the Rocky Mountains to 12,095 feet at Independence Pass. The combination of altitude (which independently causes nausea), tight curves through Glenwood Canyon, and the dramatic switchbacks of Independence Pass makes this one of the most motion-sickness-prone routes in North America.
Key facts
- The Denver to Aspen trip covers about 200 miles, which is 322 km.
- It takes about 4 hours.
- The terrain is mountain highway, which puts the route in the very high band for motion sickness.
- 3 sections are flagged as motion sickness pressure points, starting with Eisenhower Tunnel approach.
- Steadiest place to sit: Driver's seat, or front passenger.
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Where Motion Sickness Hits Hardest
The sections most likely to trigger motion sickness are: Eisenhower Tunnel approach, Glenwood Canyon, Independence Pass (CO-82). Independence Pass is closed in winter - take I-70 to Glenwood Springs and CO-82 south instead. Altitude sickness compounds motion sickness above 9,000 feet. Hydrate aggressively before and during the drive.
- Glenwood Canyon: 12.5 miles of I-70 threading the canyon on over 40 bridges and through two tunnels along the Colorado River, per CDOT. codot.gov
- Independence Pass: Crosses the Continental Divide at 12,095 feet; vehicles over 35 feet combined length are prohibited, per CDOT. codot.gov
Season and closures: Independence Pass closes for winter, typically on or near November 7, and reopens the Thursday before Memorial Day; it opened May 21 for the 2026 season. In closure months, take I-70 to Glenwood Springs and CO 82 south. codot.gov
Route facts, checked at the source
Each fact below was checked against the linked official or operator page.
- Independence Pass summit: 12,095 feet at the Continental Divide. codot.gov
- Vehicle length limit: Vehicles and trailers with a combined length over 35 feet are prohibited on Independence Pass. codot.gov
- Winter closure: CO 82 over Independence Pass closes for winter, typically on or near November 7, and reopens the Thursday before Memorial Day; it opened May 21 for the 2026 season. codot.gov
- Glenwood Canyon: The I-70 Glenwood Canyon stretch is 12.5 miles with over 40 bridges and two tunnels. codot.gov
Best Seat for Motion Sickness on This Drive
Driver's seat, or front passenger.
Going on the Denver to Aspen drive? Set it up first
Set it up before you pull out, not at the first lay-by. Dizzout is a drug-free app that plays precisely calibrated audio through any headphones you already own, wired or Bluetooth, with relief in about 90 seconds. Free to try.
Before you need it: find out how prone you are
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Prevention Tips for the Denver to Aspen 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
When is Independence Pass open?
CDOT closes CO 82 over the pass for winter, typically on or near November 7, and reopens it the Thursday before Memorial Day; in 2026 it opened May 21. Outside that window, the route to Aspen runs I-70 to Glenwood Springs and CO 82 south, which also skips the biggest switchbacks.
Can I take an RV over Independence Pass to Aspen?
Not if your vehicle and trailer together run over 35 feet: CDOT prohibits that combined length on the pass. Longer rigs use I-70 to Glenwood Springs and approach Aspen from the west, which is the gentler drive for passengers anyway.
How high is Independence Pass?
12,095 feet at the Continental Divide, per CDOT. At that height, nausea can come from thin air as much as from the switchbacks, so hydrate, climb unhurried, and do not stack a heavy meal on top of the altitude.
What is the Glenwood Canyon part of the drive like?
Spectacular and briefly relentless: 12.5 miles of I-70 on more than 40 bridges and through two tunnels along the Colorado River, per CDOT. The road swings with the canyon, so sensitive passengers should have eyes up and screens away before it starts.
Is nausea near the summit motion sickness or altitude?
Above about 9,000 feet it can be either, and often both. Motion sickness eases once the motion stops; nausea that stays with you at a parked overlook points to altitude. The response to altitude is rest, water and losing height, not a better seat.
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.