Denver International Airport sits on the eastern plains, about 25 miles from downtown Denver. That distance from the city is deceiving because by the time you pull off the highway and start climbing, the mountains come at you fast. Most of the ski resorts and mountain towns — Breckenridge, Vail, Keystone, Steamboat Springs — are another hour to two hours west of that. The rental car you choose at DEN is going to spend real time on mountain roads. Getting that choice wrong is a problem.
How the Rental Pickup Works at DEN
All the major rental companies at Denver airport operate out of a consolidated facility separate from the main terminal. After grabbing bags, head outside to the bus pickup area and take the rental car shuttle. The shuttle runs frequently and the ride is short — a few minutes — but it adds a bit of time to the process, so factor that in, especially after a long flight.
All the familiar names are there: Enterprise, Hertz, Avis, Budget, National, Alamo, Dollar, and Thrifty. The counters are inside the consolidated building. During peak ski season, the facility gets busy fast in the mornings. Pre-booking online saves a lot of standing around.
The Vehicle Actually Matters Here
This is not the kind of trip where you grab the cheapest compact car and roll. Colorado mountain roads, and especially the I-70 mountain corridor, are a different category of driving. Colorado enforces a Traction Law on major mountain routes. When it’s active, vehicles must have either AWD or 4WD with adequate tires, or chains. A standard 2WD sedan or front-wheel drive compact can literally be turned away at the highway entrance point by Colorado Department of Transportation personnel. It happens.
Rent a midsize SUV or full-size SUV with AWD at minimum. If the plan involves any serious backcountry access or unpaved mountain roads, a 4WD vehicle with higher ground clearance makes sense.
One thing worth asking at the counter is whether the vehicle has all-season or winter-rated tires. Most rental fleets run all-season tires, which is acceptable under the traction law. True dedicated snow tires are unusual to find in a rental, but knowing what’s on the vehicle is never a bad idea.
Book the Right Vehicle Early
AWD and 4WD SUVs at DEN run short during ski season. December through early April, everyone wants one. Waiting until a week before the trip to book is how people end up stuck with a midsize sedan and a prayer. Lock in the vehicle type early. The price goes up as availability tightens, and at some point there’s simply nothing left to choose from.
If a cheaper rate shows up on a smaller car after booking, resist the temptation. Save the upgrade fee and just keep the mountain-ready vehicle.
Winter vs. Summer: What Changes
Winter is the harder season to get wrong. Snow squalls on Vail Pass and Eisenhower Tunnel can turn a clear day into a white-out with very little warning. I-70 shuts down regularly during major storms. Keeping a small emergency kit in the car — a blanket, some food and water, jumper cables — is genuinely smart, not excessive. Traffic can back up for hours when CDOT closes the interstate.
Summer driving is a different story. The passes are clear, the roads are dry, and the scenery is something else entirely. But summer brings its own quirks. Afternoon thunderstorms are almost a daily event in the mountains from late June through August. These storms can bring hail, lightning, and heavy rain in a matter of minutes. Wildlife is active all summer — deer and elk cross highways at dawn and dusk constantly, and hitting one is a serious accident. Slow down at night.
AWD is technically less critical in dry summer conditions, but the mountain terrain still rewards a vehicle with good stability and clearance. You are more likely to take a dirt forest service road to a trailhead in summer, and a car with real ground clearance earns its keep.
Fueling Up Before You Head Into the Hills
Gas gets pricier as you climb in elevation. Mountain town gas stations charge a premium, and some of the smaller resort areas have limited options. Fill up the tank in the Denver metro area before heading west on I-70. There are plenty of stations right off the highway before you hit the foothills. Trying to fuel up in a place like Silverthorne or Frisco isn’t the end of the world, but you’ll pay for the convenience.
A Few More Things Worth Knowing
Carry your rental agreement and insurance documents in the car. If there is any uncertainty about whether existing auto insurance or a credit card benefit covers rentals in mountain conditions, sorting that out before leaving is the right move — not after the incident. Most personal auto policies do extend to rentals, but coverage for off-road use or unpaved roads can vary.
Check road conditions before leaving the hotel each morning. CDOT’s COtrip.org website and app are the go-to resources for live road conditions, closures, and traction law status across every major mountain pass in the state.
The drive from DEN into the mountains is one of the genuinely great road trips in the country. The right vehicle makes it easy.