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Routes
Hiking trails & Routes
Boulder County
Superior

Coalton Trail and High Plains Loop

Routes
Hiking trails & Routes
Boulder County
Superior

Coalton Trail and High Plains Loop

Moderate

1

hikers

Coalton Trail and High Plains Loop

02:24

8.87km

160m

Hiking

The Coalton Trail and High Plains Loop offers a refreshing escape into Colorado's open plains, providing sweeping views of the Front Range foothills, including the Flatirons, and fields of prairie grass and wildflowers. This moderate 5.5-mile (8.9 km) hiking route, with 511 feet (156 metres) of elevation gain, takes about 2 hours and 23 minutes to complete, making it a great option for a half-day adventure. You'll find yourself traversing rolling terrain, with the High Plains Trail adding a few short, steep climbs to keep things interesting.

Planning your visit is easy, as the Coalton Trailhead boasts ample parking, ADA spaces, and restrooms. The trails are multi-use, so expect to share the path with cyclists and equestrians, and your leashed dog is welcome too. Given the sun-exposed nature of the area, especially during warmer months, it's wise to carry sufficient water and sun protection. Keep an eye out for livestock, and give them space if you encounter them on the trail.

This trail system is steeped in local history, forming part of the famous Morgul-Bismarck Loop from the 1980s Coors International Bicycle Classic, often called the "Dirty Bismarck Loop." Beyond its historical cycling connection, the Coalton Trail also links to other significant routes like the Coal Creek Trail and Marshall Mesa, offering extensive opportunities for longer explorations. It's a fantastic choice for those seeking a blend of natural beauty, moderate exercise, and a glimpse into the region's past.

Last updated: June 9, 2026

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Waypoints

A

Start point

Parking

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1

2.51 km

Marshall Mesa view

Highlight • Viewpoint

Great views of Marshall Mesa and the Flat Irons along the Coalton Trail.

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B

8.87 km

End point

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Way Types & Surfaces

Way Types

8.84 km

< 100 m

Surfaces

8.74 km

< 100 m

< 100 m

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Elevation

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Weather

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Today

Thursday 9 July

33°C

15°C

62 %

Additional weather tips

Max wind speed: 23.0 km/h

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Frequently Asked Questions

What is the best time of year to hike the Coalton Trail and High Plains Loop?

This trail is accessible year-round, offering different experiences with each season. Spring and fall provide pleasant temperatures for hiking and vibrant scenery. Summer can be very hot and exposed, so an early start is recommended. Winter hiking is possible, but be prepared for potentially icy or muddy conditions, especially after snow.

What is the terrain like on this route?

The route primarily traverses open, rolling prairie hills and sun-exposed grasslands. You'll encounter broad, unpaved multi-use paths that may narrow into singletrack sections. Expect expansive vistas of the Flatirons and other mountains, along with opportunities to observe local wildlife and wildflowers.

Is the Coalton Trail and High Plains Loop suitable for beginners or families?

The overall loop is generally considered moderate, but sections vary. The Coalton Trail itself is often rated easy to moderately easy. However, the High Plains Trail has a steeper elevation gain and is rated as hard. There are also some technical spots and a very steep, rocky hill on the Coalton section that might challenge beginners. Families with younger children should be prepared for sun exposure and consider shorter segments. It's a multi-use trail, so expect to share it with bikers and horseback riders.

Are dogs allowed on the trail, and what are the rules?

Yes, dogs are generally allowed on trails within Boulder County Open Space. However, specific leash regulations and voice and sight control requirements may apply. Always check the latest regulations on the Boulder County Parks & Open Space website before you go to ensure a pleasant and compliant visit for you and your pet.

Do I need a permit or pay an entrance fee to access the Coalton Trail and High Plains Loop?

As part of Boulder Open Space and Mountain Parks, there are typically no entrance fees required for day use of these trails. However, specific activities or areas might require permits. It's always a good idea to check the official Boulder County Parks & Open Space and City of Boulder Open Space and Mountain Parks websites for the most current information regarding permits or regulations.

Where can I park to access the Coalton Trail and High Plains Loop?

The trail can be accessed from various points. A common starting point is the Coalton Trailhead. Parking availability can vary, especially on busy weekends. Consider arriving early to secure a spot. For detailed parking information and directions, consult official Boulder County or City of Boulder Open Space websites.

What wildlife can I expect to see along the route?

The open prairie environment offers excellent opportunities for wildlife viewing. You're likely to spot prairie dogs in their colonies, and coyotes are also known to frequent the area. Keep an eye out for various bird species and other small mammals that inhabit the grasslands.

Are there any notable viewpoints or landmarks along the trail?

Yes, one of the highlights of this route is the Marshall Mesa view, which offers expansive vistas. The trail also provides scenic views of the Flatirons and the surrounding mountains, making for a picturesque experience.

Does this route connect to other trails?

Yes, the Coalton Trail acts as a significant connector. It links to other popular trails such as the Mayhoffer Singleton Trail and the Greenbelt Plateau Trail, allowing for longer and more varied hiking, biking, or horseback riding routes. The route itself incorporates sections of the Marshall Mesa, Coalton Road, Rock Creek Trail, Coalton Trail, and High Plains Trail.

What should I bring for a hike on the Coalton Trail and High Plains Loop?

Given the sun-exposed nature of the trail, especially on hot days, it's crucial to bring sufficient water. Sun protection like a hat, sunglasses, and sunscreen is highly recommended. Comfortable hiking shoes, layers of clothing, and snacks are also advisable for this moderate-difficulty route.

Are there cafes, pubs, or accommodation options near the Coalton Trailhead?

The Coalton Trailhead is located near Superior, CO, which offers various amenities. You can find cafes, pubs, restaurants, and accommodation options in Superior and the surrounding areas. These can be convenient for pre- or post-hike refreshments and lodging.

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