Narrow mountain passes, hairpin switchbacks and long, steep grades are some of the most rewarding drives in North America. They are also where the RV you drive matters most. The right class can open roads that a bigger rig simply cannot take.
What are the RV classes?
- Class A. Bus-style motorhomes, roughly 26 to 45 feet long, on gas or diesel chassis. The most living space, and the hardest to handle on tight roads.
- Class C. Built on a truck or van chassis with the bed over the cab, typically 21 to 35 feet. A middle ground between space and maneuverability.
- Class B. Camper vans, usually around 17 to 24 feet. They drive much like a large van and fit where others can’t.
- Towables. Travel trailers and fifth wheels. With the tow vehicle, combined length often passes 40 feet.
Which RV is best for mountain and narrow roads?
The Class B wins. Its size fits roads that ban larger vehicles. On Glacier National Park’s Going-to-the-Sun Road, vehicles longer than 21 feet, wider than 8 feet including mirrors, or taller than 10 feet are restricted from the alpine section. Many camper vans fit. Most Class A motorhomes and trailer combinations do not.
A short Class C, under about 24 feet, is a strong compromise for families who need more beds but still want to reach scenic roads.
What makes a road dangerous for an RV?
- Steep grades. Long descents can overheat brakes and cause brake fade.
- Tight switchbacks. Rear wheels cut inside the turn, and a long rear overhang swings wide.
- Low clearance. Tunnels, bridges and overhangs. Know your height, including the air conditioner on the roof.
- Narrow lanes. No shoulders or guardrails leaves little room for error.
- Wind and altitude. Tall RVs catch crosswinds, and gas engines lose power at high elevation.
- Unpaved surfaces. Washboard gravel and ruts shake loose cabinets and test suspensions.
What about towing a trailer on mountain roads?
Towing adds its own risks. On long descents, a heavy trailer can push the tow vehicle, and sway gets worse with speed and crosswinds. Make sure the trailer’s brakes work and the brake controller is set correctly, use a weight-distribution hitch with sway control, and stay well within your tow vehicle’s ratings. Fifth wheels tow more steadily than travel trailers because the hitch sits over the truck’s rear axle.
How do you drive an RV safely on challenging roads?
- Downshift before descents and use the engine or exhaust brake. Avoid riding the brakes.
- Know your exact length, height and weight, and keep them posted on the dashboard.
- Use an RV-specific GPS that routes around size restrictions and low clearances.
- Check restrictions first with the park service or state DOT before you go.
- Take wide turns and watch your tail swing.
- Use pullouts to let faster traffic pass.
- Check brakes and tires and fill the tank before long mountain stretches.
How do you choose the right RV for the roads you want to drive?
If your dream trips include alpine passes and national park scenic drives, length matters more than square footage. Make a list of the roads you want to drive, check their size limits, and shop for an RV that fits. On TrueRVs, you can compare RVs by class, from nimble camper vans to full-size Class A coaches, from dealers and private sellers, and narrow the search to the length that fits your plans.
Frequently asked questions
Can a Class A motorhome drive in the mountains? Yes, on most major highways and passes. Avoid scenic roads with length limits, and use engine braking on long descents.
What is the easiest RV to drive? A Class B camper van. It handles much like a large van and fits in standard parking spaces in many places.
What RV length fits the most national park campgrounds? Many older park campgrounds were built for smaller rigs. RVs under about 30 feet fit the most sites, but always check site length limits before booking.
