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Routes
Road cycling routes
United States
Colorado
Adams County
Commerce City

Rocky Mountain Arsenal National Wildlife Refuge Perimeter Trail

Routes
Road cycling routes
United States
Colorado
Adams County
Commerce City

Rocky Mountain Arsenal National Wildlife Refuge Perimeter Trail

Hard

4.8

(6698)

16,776

riders

Rocky Mountain Arsenal National Wildlife Refuge Perimeter Trail

05:14

34.2km

90m

Road cycling

Cycle the 21.2-mile Rocky Mountain Arsenal Perimeter Trail for wildlife viewing, prairie views, and a challenging gravel ride.

Last updated: February 26, 2026

Tips

The surface along some of this route may not be suitable

Some segments of your route comprise a surface that may not be suitable for your chosen sport.

After 2.13 km for 3.67 km

After 5.97 km for 3.57 km

After 15.7 km for 17.5 km

Waypoints

A

Start point

Parking

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1

2.46 km

Greenway Trail

Highlight (Segment) • Trail

The Rocky Mountain Greenway Trail, or Greenway Trail, is one of the main trails on the southern side of the Rocky Mountain Arsenal National Wildlife Refuge. It helps connect different …

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2

23.8 km

Perimeter Trail (Gravel)

Highlight (Segment) • Trail

The Perimeter Trail is the longest trail in Rocky Mountain Arsenal National Wildlife Refuge. It runs 14 miles in one direction around the edge of the park. It is a …

Tip by

B

34.2 km

End point

Parking

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Way Types & Surfaces

Way Types

25.5 km

4.85 km

2.19 km

1.35 km

223 m

< 100 m

< 100 m

Surfaces

25.5 km

7.44 km

1.17 km

108 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (1,630 m)

Lowest point (1,560 m)

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Weather

Powered by Foreca

Sunday 31 May

27°C

12°C

15 %

Additional weather tips

Max wind speed: 10.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

What is the terrain like on the Rocky Mountain Arsenal National Wildlife Refuge Perimeter Trail?

The trail is mostly gravel and dirt, with some sections that can be sandy or muddy, especially after rain. It's largely a flat doubletrack with a mellow grade, making it non-technical and suitable for gravel bikes or road bikes with wider tires.

Is the Perimeter Trail suitable for beginner cyclists?

Yes, the trail is generally considered easy with minimal elevation changes, making it suitable for all skill levels, including beginner road cyclists and families. It's a great option for a less strenuous outing.

What kind of wildlife can I expect to see while cycling?

The refuge is home to abundant wildlife. You have a good chance of spotting bison, mule and white-tailed deer, coyotes, various raptors, bald eagles, and many species of songbirds and waterfowl. The northern and eastern sides of the trail are particularly known for wildlife viewing.

Where can I park to access the Perimeter Trail?

Parking is available at the visitor's center, which is conveniently located near the starting trailhead. There are also restrooms at the visitor's center for your convenience.

Are there any fees or permits required to cycle this trail?

No, visiting the Rocky Mountain Arsenal National Wildlife Refuge and using its trails, including the Perimeter Trail, is completely free of charge. You do not need any special permits.

Are e-bikes allowed on the Perimeter Trail?

Yes, Class 1, 2, and 3 e-Bikes are permitted on the Perimeter Trail and other designated Refuge roads. However, bikes are not allowed in the bison enclosure areas or on the one-way Wildlife Drive.

Is the trail dog-friendly?

As a National Wildlife Refuge, pets are generally not allowed on the trails to protect the wildlife. It's best to leave your furry friends at home when visiting.

What is the best time of year to cycle the Perimeter Trail?

The trail can be enjoyed year-round, but spring and fall offer pleasant temperatures and excellent wildlife viewing opportunities. Summers can be hot and exposed, while winters may bring snow and ice, potentially affecting trail conditions.

Are there any amenities like water or bike repair stations along the route?

There is no water available directly along the trail, so be sure to bring enough with you. However, there is a bike repair station and an air pump located at the intersection of 64th Avenue and Havana Street.

Does the Perimeter Trail connect to other trails?

Yes, the Perimeter Trail is the longest trail in the refuge and forms a loop. It also incorporates sections of other trails such as the Greenway Trail and the Perimeter Trail (Gravel). You might also encounter parts of the Denver Orbital Trail and the Rocky Mountain Greenway Trail.

Are there any potential detours or construction to be aware of?

Yes, it's a good idea to check for current conditions before you go. Due to ongoing construction projects, such as the 96th Avenue widening, temporary detours like the Buckley Trail may be in effect, which could alter your route slightly.

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