Mosquito Pass Road
America's highest driveable pass at 13,186 feet
At 13,186 feet above sea level, Mosquito Pass claims the title of America’s highest driveable pass, threading between Leadville and Fairplay through the heart of Colorado’s mining country. The route climbs relentlessly from Leadville’s historic mining district, passing the crumbling remains of the London Mine and countless other boom-era operations that once extracted millions in gold and silver from these unforgiving peaks. Above treeline, the road becomes a narrow shelf carved into loose talus, where one wrong move means a tumble down thousand-foot slopes.
This is expert-only terrain demanding serious preparation and experience. Stock vehicles won’t survive the boulder fields and exposed switchbacks—you need heavy-duty skid plates, low-range gearing, and the skills to navigate technical rock gardens at oxygen-starved altitude. Weather can turn deadly fast above treeline; attempt this only between July and early September when snow has cleared. The reward is standing atop the Continental Divide with views stretching across half of Colorado, surrounded by the ghosts of America’s greatest mining boom.
Trail Specs
| Difficulty | Expert |
|---|---|
| Trail Type | Technical 4x4 |
| Surface | Rock |
| Features | High Altitude, Historic, Remote, Scenic |
| Length (miles) | 11 mi / 17.7 km |
| Duration | 1 day |
| Max elevation (ft) | 13186 ft |
| Best season | July-September |
| Minimum vehicle | Modified 4WD with skid plates |
| Nearest town | Leadville, Colorado |
| Land manager | San Isabel National Forest |
| Permit required | No |
| Cell service | None |
| Water crossings | No |
| Dispersed camping | Yes |
| Start coordinates | |
| End coordinates | |
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| Find on Google | Search on Google → |
Location
Trail Conditions
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Frequently asked questions
Can a stock Jeep Wrangler or 4Runner run Mosquito Pass, or does it need modifications?
Stock rigs will struggle. The rocky, loose shelves and exposed ledges near the summit demand skid plates, high clearance, and ideally a locker or two. A bone-stock rig risks frame and oil pan damage on the boulder sections below the summit.
When does Mosquito Pass Road typically open and close each year?
July through September is your window. Snow can close the pass well into June and return as early as October — at 13,186 feet there's no buffer. Check current conditions with San Isabel National Forest before you go.
Do I need a permit or is there a fee to drive Mosquito Pass?
No permit required and no fee to drive the trail. It crosses San Isabel National Forest land, so standard national forest rules apply — no campfire bans ignored, pack out your trash.
What's the hardest section and what should I actually expect there?
The final push to the summit from the Leadville side is the crux — loose rock, steep shelf road, and no guardrails with serious exposure. One wrong line and you're off the edge; this is not the place to wing it or let anxiety make you overcorrect.
Is there any gas or services between Leadville and Fairplay, and how far is the nearest fuel?
Zero services on the trail — it's a 17.7-mile remote alpine crossing with no cell service at all. Top off in Leadville before you start; Fairplay has fuel on the east end if you're running the full traverse west to east.
Trail track
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