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Routes
Gravel rides
United States
Colorado
Adams County

Thornton

The best gravel rides around Thornton

4.7

(45)

424

riders

29

rides

Gravel biking around Thornton, Colorado, benefits from an extensive network of over 140 miles of trails and more than 2,500 acres of parks and open space. The terrain primarily features high plains landscapes, open fields, and multi-use paths, often providing views of the Front Range mountains. This area includes significant natural preserves like the 15,988-acre Rocky Mountain Arsenal National Wildlife Refuge, which offers dirt roads suitable for gravel cycling. The region's trail systems connect various open spaces and parks, providing…

Last updated: May 16, 2026

3.8

(4)

82

riders

#1.

Rocky Mountain Arsenal National Wildlife Refuge Perimeter Trail

43.4km

03:58

130m

130m

Cycle the 27.0-mile (43.4 km) moderate Rocky Mountain Arsenal Perimeter Trail, spotting wildlife and enjoying Front Range views.

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Moderate

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate
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Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate
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Popular around Thornton

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Tips from the Community

michaelf
December 15, 2025, Open Space Trailhead, east of Erie

great view of the Front Range and dedicated MTB trails . This trailhead is on highest point of this open space area with the best views.

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The Henderson Hill trail is a short out and back paved trail to a low rise in old Rocky Mountain Arsenal area, now a wildlife refuge. Even though the difference in elevation is minimal the view is far reaching to the east and south. You can actually reach this spot using only bikepaths (route5) from Commerce City. See this ride https://www.komoot.com/tour/2710436405?share_token=aTyj2lJ1YHiQOhPskXyq8prHxb5AoOId67IJs0FNb2tJwCStGp&ref=wtd. The way that this ride got around the east side of the refuge is not recommended though.

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Warembourg Open Space is a peaceful spot along Coal Creek and the Coal Creek Regional Trail, shaped through conservation efforts by Boulder County, Louisville, and Lafayette. Established in 1999 and 2003, it offers hikers a lovely riparian habitat with cottonwoods, wildlife, and scenic creekside views—a perfect place for an easy, immersive walk close to nature.

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This packed dirt multi-use path runs over the rolling hills of the Ruth Roberts Preserve, linking the Lake Link and Rock Creek Trails. From here, you get panoramic views of Colorado's Front Range.

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Zachary
June 24, 2025, Lake Link Trail

This packed dirt multi-use trail runs for nearly nine miles, from Lac Amora Open Space to McKay Lake. It links many small lakes, ponds, and streams in Broomfield, and is a great connector for other trails.

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The Coal Creek Trail is a long double track trail that runs between the towns Superior, Louisville, Lafayette and Erie. It's an easy, beginner ride perfect for those interested in riding off road.

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After losing their nest to a lightning strike in August, it was unclear which location the eagles would choose for their to new nest. With limited suitable nesting trees in the area—including one along the trail near their previous nest—they have now settled in a tree here, near the southern end of S. 104th St.

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The Marry Miller Trail spans about 1.5 miles and features gravel surfaces. It is open to hikers, bikers, and equestrians; dogs visiting must be kept on a leash.

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Frequently Asked Questions

Are there gravel bike trails suitable for beginners or families in Thornton?

Yes, Thornton offers a variety of gravel bike trails suitable for different ability levels. Many routes traverse open plains and multi-use paths, making them accessible. For example, the Rocky Mountain Arsenal National Wildlife Refuge Perimeter Trail is rated as moderate and offers a relatively flat experience with wildlife viewing, which can be enjoyable for families. The extensive trail system includes many sections that are not overly technical.

What scenic views or attractions can I expect to see while gravel biking in Thornton?

Gravel biking around Thornton offers stunning views of the Front Range mountains and diverse natural landscapes. Routes like the Rocky Mountain Arsenal National Wildlife Refuge Perimeter Trail provide opportunities for wildlife spotting. You can also find natural water sources like lakes and reservoirs. For instance, Standley Lake and Lowell Ponds Wildlife Area are notable attractions in the vicinity, offering scenic spots to explore.

How extensive is the gravel biking trail network in Thornton?

Thornton boasts an extensive network of over 140 miles of trails and more than 2,500 acres of parks and open space. This includes significant natural preserves like the 15,988-acre Rocky Mountain Arsenal National Wildlife Refuge. The trail systems connect various open spaces and parks, providing diverse riding environments and numerous opportunities for gravel biking.

What do other gravel bikers say about the trails in Thornton?

The gravel biking routes in Thornton are highly rated by the komoot community, with an average score of 4.8 stars from over 30 reviews. More than 400 gravel bikers have used komoot to explore Thornton's varied terrain. Riders often praise the extensive trail systems, open plains, and the scenic views of the Front Range.

Can I find circular gravel biking routes in the Thornton area?

Yes, several popular gravel biking routes in the Thornton area are designed as loops. For example, the Coal Creek Trail – View of Longs Peak loop from The Field Open Space and the Adler-Fingru Open Space – Aquarius Open Space loop from The Field Open Space are both excellent circular options, allowing you to start and finish at the same point.

What is the best time of year for gravel biking in Thornton, and are there winter options?

The Front Range area, including Thornton, generally offers good gravel biking conditions for much of the year. Spring and fall often provide pleasant temperatures and vibrant scenery. While winter can bring snow, many trails remain accessible, especially on milder days, though conditions can vary. It's always advisable to check local weather and trail conditions before heading out during colder months.

How can I access the gravel bike trails around Thornton using public transport or find parking?

Thornton and its surrounding areas offer various access points to the trail system. While specific public transport routes to every trailhead may vary, RTD Denver provides bus services in the region. Many parks and open spaces, such as those providing access to the Rocky Mountain Arsenal National Wildlife Refuge or Coal Creek Trail, typically have designated parking areas for visitors. For detailed information on parking and public transport options for specific trailheads, it's recommended to consult local city and park resources, such as the Thornton Parks and Recreation website.

Are there any less crowded gravel biking options around Thornton?

Given Thornton's extensive network of over 140 miles of trails and numerous open spaces, it's possible to find less crowded options, especially during off-peak hours or by exploring some of the lesser-known connections within the system. While popular routes like the Rocky Mountain Arsenal Perimeter Trail can see more traffic, the sheer volume of trails means you can often find quieter sections or alternative paths to enjoy the solitude of the high plains landscape.

Are the gravel bike trails around Thornton suitable for dogs?

Many of Thornton's parks and open spaces feature multi-use trails and pedestrian paths where dogs are permitted, typically on a leash. For example, the Rocky Mountain Arsenal National Wildlife Refuge has specific regulations regarding pets. It's always best to check the specific rules for each trail or open space you plan to visit, as regulations can vary. Ensure your dog is comfortable with the distance and terrain.

Are there places to eat or stay near the gravel biking routes?

Thornton and its neighboring communities offer a range of amenities, including cafes, pubs, and accommodation options. Areas near major trail access points, such as those around the Rocky Mountain Arsenal National Wildlife Refuge or the Coal Creek Trail, will have various dining and lodging choices. You'll find options ranging from quick bites to sit-down restaurants, as well as hotels and other lodging facilities to suit different preferences.

What is the difficulty level of gravel biking routes in Thornton?

The gravel biking routes in Thornton cater to a range of difficulty levels. While the majority of the 27 available tours are rated as 'moderate', there are also 'easy' and 'difficult' options. For instance, the Greenway Trail – Meadowlark Trail loop from Jefferson Academy Elementary is classified as difficult, offering a more challenging ride with significant elevation changes. This variety ensures that both casual riders and experienced gravel bikers can find suitable routes.

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