Thank you for your interest in
Canyonlands National Park. While we don't set maximum size requirements for the White Rim Road, larger vehicles may have problems with some of the narrower sections or sections that have overhangs. While many of these larger vehicles - and specifically cab-over campers - have completed that road without incident, there is never a guarantee of safety or that your vehicle will not get damaged. Factors that influence safe passage include vehicle size and capability, driver experience, weather, and road conditions.
In the end, we largely leave it up to the individual to assess whether they can travel the rugged and wild road safely and without incident. Often this means making difficult decisions to cancel the trip or turn around mid-trip. I'm not trying to scare or dissuade you, but I've attached a picture of someone who did not make the correct decision and likely wound up with towing fees and vehicle damage in excess of $8,000.
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If you have any further questions please do not hesitate to contact me.
Canyonlands National ParkDivision of Interpretation and Visitor Services