The 10 Steepest Mountain Passes in Colorado

A narrow stretch of highway between Silverton and Ouray. Photo Credit: Reinhard Schön (wikimedia).

One thing that shocks visitors coming to Colorado are the roads. Not only is the speed limit a high 75 miles per hour in many places, the routes can also get extremely steep. If you’re not used to it, driving in Colorado can feel like you’re falling off the side of a cliff. Curious about how steep some of these roads really were, we tracked down the steepest paved mountain passes in Colorado with a little help from Colorado’s Department of Transportation.

RELATED: 20 Highest Roads in Colorado

10. Rabbit Ears Pass – 6.8% at 9,426 feet

9. Wolf Creek Pass – 6.8% at 10,850 feet

The 10 Steepest Mountain Passes in Colorado

View of valley from Wolf Creek Pass in the San Juan Mountains of south central Colorado USA.

8. Douglas Pass – 7% at 8,268 feet

The 10 Steepest Mountain Passes in Colorado

Photo Credit: Craig Gaebel.

7. Vail Pass – 7% at 10,666 feet

The 10 Steepest Mountain Passes in Colorado

Road biking over Vail Pass. Vail, Colorado. Photo Credit: OutThere Colorado.

RELATED: 9 Scenic Overlooks You Can’t Miss

6. Molas Pass – 7%+ at 10,910 feet

The 10 Steepest Mountain Passes in Colorado

The Million Dollar Highway (US-550) at Molas Pass near SIlverton, Colorado.

5. Spring Creek Pass – 7.5% at 10,901 feet

4. McClure Pass – 8% at 8,755 feet

3. Red Mountain Pass – 8% at 11,018 feet

The 10 Steepest Mountain Passes in Colorado

Red Mountain Pass on a snowy day.

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2. Hoosier Pass – 8% at 11,541 feet

The 10 Steepest Mountain Passes in Colorado

Mount Lincoln Near Breckenridge – 14er near Hoosier Pass with Mount Lincoln Ice Falls. Breckenridge/Alma, Colorado USA.

1. Slumgullion Pass – 9.4% grade at 11,361 feet

The 10 Steepest Mountain Passes in Colorado

Photo Credit: Tom Margie

RELATED: 20 Highest Roads in Colorado

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