Best mountain passes in Park County, Colorado, traverse a high-country landscape where the Rocky Mountains meet expansive open spaces. This region encompasses parts of the Pike National Forest and San Isabel National Forest. Many passes hold historical significance, serving as routes for early explorers, miners, and settlers. These mountain passes offer diverse experiences through alpine scenery and forested areas.
Last updated: April 25, 2026
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At an elevation of 10,000 feet, Kenosha Pass offers stunning views of the surrounding mountains. It is also a trailhead for the Colorado Trail, therefore, you will find a trail register here. If you want to grab a bite or charge your devices, this is a good spot to hitch into the town of Jefferson, which is just 4.3 miles south of here.
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Hoosier Pass is a mice mountain climb to begin from Breckenridge. The road has a decent sized shoulder on the way up and you are rewarded with mountain views once you reach the switchbacks. In the winter they do a good job of clearing the roads, but there is quite a bit of sand.
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This trailhead along the Colorado Trail marks the beginning (or end) of Section 6. It is located right at the Kenosha Pass.
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Trout Creek Pass sits at an elevation of 9,346 feet and connects the Arkansas River and the Plate River Valleys. The pass was originally used by the Denver, South Park and Pacific Railroad to connect Denver to Leadville during the silver boom.
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Hoosier Pass sits on the Continental Divide at 11,542 feet in elevation and connects the towns of Alma & Breckenridge. It is also the highest point along the TransAmerica bike trail, a 4,200-mile route from Oregon to Virginia.
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Boreas Pass tops out at 11,481 feet and connects Como to Breckenridge. Boareas Pass was the nation's highest narrow-gauge railroad, running from 1872 to 1938. The pass was then converted to an automobile route in 1952.
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Thanks to the former railroads need for gradual ascents the climb to the 3500 m pass is long but easy to pedal on the excellent gravel road.
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Hoosier Pass sits on the Continental Divide at 11,542 feet in elevation and connects the towns of Alma & Breckenridge. It is also the highest point along the TransAmerica bike trail, a 4,200-mile route from Oregon to Virginia.
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Park County offers several mountain passes with stunning views. Kenosha Pass, at 10,000 feet, provides expansive vistas of the surrounding mountains and is known for its vibrant fall foliage. Hoosier Pass, located on the Continental Divide, also offers rewarding mountain views, especially from its switchbacks.
Yes, Park County is rich in historical mountain passes. Georgia Pass was historically used by Ute and Arapaho tribes, and later became a toll road in 1861 for wagons traveling to mining towns. Boreas Pass Gravel served as the nation's highest narrow-gauge railroad from 1872 to 1938 before being converted into an automobile route.
The mountain passes in Park County are excellent starting points for various outdoor activities. You can find numerous hiking opportunities, including challenging routes like the DeCaLiBron loop near Mount Bross. For cycling enthusiasts, there are extensive gravel biking routes, such as the Boreas Pass Road, and challenging road cycling routes like the one over Guanella Pass.
For those seeking a challenge, Mount Bross, though primarily a summit, offers a challenging high-altitude trek as part of the DeCaLiBron loop. French Pass is also categorized as challenging. Cyclists will find the climb up Hoosier Pass from Breckenridge to be a rewarding challenge with a decent shoulder.
The best time to visit mountain passes in Park County, Colorado, is typically from late spring through early fall (May to October). During these months, the passes are generally clear of snow, offering optimal conditions for hiking, cycling, and scenic drives. Fall is particularly popular for the vibrant aspen foliage around passes like Kenosha Pass.
Yes, Park County, Wyoming, is home to the renowned Beartooth Pass. Located within the Shoshone National Forest, it's part of the Beartooth Highway, often called 'America's most beautiful highway.' This pass offers breathtaking panoramic views of jagged peaks, alpine lakes, and plateaus, making it a prime destination for scenic drives and motorcycling.
The mountain passes in Park County traverse diverse natural landscapes. You'll encounter alpine scenery, expansive open spaces, and dense forests, particularly aspen forests around Kenosha Pass. Many passes offer stunning viewpoints of the Rocky Mountains, and you may spot various flora and fauna native to high-altitude environments.
While specific crowd levels can vary, exploring passes like Weston Pass or Trout Creek Pass might offer a more secluded experience compared to some of the more well-known routes. These passes still provide beautiful scenery and historical interest without the same level of traffic.
Visitors frequently appreciate the combination of natural beauty and historical significance. Many enjoy the challenging climbs and rewarding views, especially from passes like Hoosier Pass. The opportunity to explore old railroad grades and mining history, as found on Boreas Pass Gravel, also adds a unique dimension to their experience.
Absolutely. Park County is a fantastic destination for gravel biking. The Boreas Pass Gravel route is particularly popular, offering a scenic ride along a historic railroad grade. You can find more gravel biking routes and tours in the region on our dedicated Gravel biking in Park County guide.
Winter access to mountain passes in Park County can be limited due to heavy snowfall. While main roads like Hoosier Pass are often cleared, many higher-elevation passes and unpaved routes, such as Beartooth Pass in Wyoming, are typically closed seasonally. It's always best to check current conditions before planning a winter visit.
Yes, Kenosha Pass serves as a significant trailhead for the Colorado Trail, marking the beginning or end of Section 6. This makes it a popular spot for long-distance hikers and those looking to experience a segment of this iconic trail.


See even more epic mountain passes by checking out these guides in Park County: