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Routes
Running trails & routes
United States
Colorado
Jefferson County

Green Mountain Loop

Hard

4.8

(6411)

15,596

runners

Green Mountain Loop

01:47

14.6km

310m

Running

Tackle the challenging Green Mountain Loop, a 9.1-mile (14.6 km) jogging route that demands a good effort. You will gain 1020 feet (311 metres) in elevation, making this a difficult workout that typically takes around 1 hour and 47 minutes to complete. As you ascend, you will encounter diverse terrain…

Last updated: April 23, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

William Frederick Hayden Park

Waypoints

A

Start point

Parking

Get Directions

1

8.77 km

Viewpoint John O. Hayden Trail

Highlight • Viewpoint

The narrow path leads along open grasslands and over gentle hills.

Tip by

2

10.2 km

Green Mountain Peak

Highlight • Summit

Great views of Denver. On a clear day can see up to Longs Peak and down to Pikes Peak.

Tip by

B

14.6 km

End point

Parking

Loading

Way Types & Surfaces

Way Types

7.97 km

3.73 km

2.56 km

211 m

144 m

Surfaces

7.56 km

3.15 km

2.23 km

1.01 km

554 m

120 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 (2,070 m)

Lowest point (1,810 m)

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Weather

Powered by Foreca

Today

Wednesday 6 May

3°C

-4°C

73 %

Additional weather tips

Max wind speed: 9.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

Where can I park to access the Green Mountain Loop?

The Green Mountain Loop is located within William Frederick Hayden Park. You can find parking areas conveniently located around the park, offering direct access to the trail network. Given its popularity, arriving earlier in the day is advisable, especially on weekends.

Are there any fees or permits required to jog on this trail?

No, there are generally no specific permits or entrance fees required to jog the Green Mountain Loop within William Frederick Hayden Park. The park is open to the public for recreational use.

What are the regulations for William Frederick Hayden Park?

William Frederick Hayden Park is a multi-use park. Regulations typically include keeping dogs on a leash, staying on marked trails, and packing out all trash. It's always a good idea to check the official Lakewood Parks and Recreation website for the most current rules and any specific advisories.

Is the Green Mountain Loop dog-friendly?

Yes, the Green Mountain Loop is generally dog-friendly. However, dogs are typically required to be on a leash at all times within William Frederick Hayden Park. Always ensure you clean up after your pet to help maintain the trail for everyone.

What is the best time of year to jog this route?

Spring and fall offer pleasant temperatures for jogging the Green Mountain Loop. In spring, you might see wildflowers. Summer can be very hot due to the lack of shade, making early mornings or late evenings preferable. Winter jogging is possible, but be prepared for potentially icy or snowy conditions, especially on higher sections.

What kind of terrain can I expect on the Green Mountain Loop?

The terrain on this loop is varied, featuring a mix of old jeep roads and singletrack. You'll encounter sections with more technical, rocky terrain, including challenging rock sections. Some parts may also have basic log steps for steeper ascents. The trail is generally unpaved.

What can I see along the Green Mountain Loop?

The loop offers diverse and expansive scenery. From the 6,800-foot summit of Green Mountain, you'll get stunning views of the Denver metropolitan area to the east and high mountain peaks to the west. Notable points include Viewpoint John O. Hayden Trail and Green Mountain Peak. You might also spot red rock features and open slopes with wildflowers in season.

How challenging is this jogging route?

The Green Mountain Loop is rated as difficult for jogging. It includes a challenging ascent to the park's highest point, with significant elevation gain. While there are mellower sections, the overall route provides a substantial workout, suitable for experienced trail runners looking for a challenge.

Is there any shade on the trail?

A significant portion of the Green Mountain Loop, particularly in William Frederick Hayden Park, has a lack of tree cover. This means the trail is largely exposed to the sun and offers very little shade. It's crucial to plan accordingly with sun protection and hydration, especially during warmer months.

Does the route intersect with other trails?

Yes, the Green Mountain Loop utilizes and intersects with several other trails within the park's network. Sections of the route follow the 470 Trail, Colorado Front Range Trail, Green Mountain Trail, John O. Hayden Trail, C-470 Trail, Summit Loop Trail, and Rooney Valley Trail, among others. This connectivity allows for customized routes.

Can I customize my route on the Green Mountain Loop?

Absolutely. The extensive network of connecting trails within William Frederick Hayden Park means you can easily customize your route. This allows you to adjust for length and difficulty, creating shorter, easier loops or longer, more challenging adventures depending on your preference and fitness level.

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