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Routes
Hiking trails & Routes
United States
Colorado
Boulder County
Louisville

Broomfield and Louisville Loop Trail

Hard

2.6

(24)

97

hikers

Broomfield and Louisville Loop Trail

07:00

27.1km

160m

Hiking

This difficult 16.8-mile hiking loop offers varied scenery, including Front Range views, open spaces, and the scenic Coal Creek corridor.

Last updated: February 26, 2026

Waypoints

A

Start point

Parking

Get Directions

1

8.29 km

Admor Open Space

Highlight • Natural

Cycling along West Dillon Road through Admor Open Space treats riders to a varied geography. The landscape unfolds with rolling hills, expansive meadows, and glimpses of majestic mountains. The open space, with its diverse terrain and natural beauty, creates a scenic and enjoyable cycling experience in this Colorado locale.

Tip by

2

11.8 km

Stearns Lake

Highlight • Lake

As the biggest lake in Carolyn Holmberg Preserve, Stearns Lake is also the most popular one and can be reached via multiple parking lots and trails. The lake itself offers a tranquil environment with great views towards the mountains.

Tip by

3

12.0 km

Stearns Lake

Highlight • Lake

As the biggest lake in Carolyn Holmberg Preserve, Stearns Lake is also the most popular one and can be reached via multiple parking lots and trails. The lake itself offers a tranquil environment with great views towards the mountains.

Tip by

4

12.0 km

Bald Eagle Nest Viewing Area

Highlight • Viewpoint

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.

Tip by

5

12.2 km

Bring a bridge camera....

Tip by

6

12.7 km

Sterns Lake

Highlight • Lake

Sterns Lake is a small lake in the Carolyn Holmberg Preserve at Rock Creek Farm which is well-known for the birding opportunities (especially the Bald Eagles in the winter) and accessible via gravel roads that are open for walkers, joggers, and bikers.

Tip by

7

12.9 km

20.9 km

Waterfall

Waterfall

9

24.2 km

Aquarius Open Space

Highlight • Trail

Aquarius Open Space is crossed by many trails, being the main one "Coal Creek Trail". There's a parking lot on the southeastern part, although you can access the area by any of the trails that go through it.

Tip by

10

24.5 km

Aquarius Open Space

Highlight • Trail

Aquarius Open Space features a few unpaved nature trails along with the wide, dirt Coal Creek Trail. There is one main parking area for the Nature Reserve, but you can access the trails on the property from a number of directions.

Tip by

11

27.1 km

Coal Creek Trail

Highlight • Trail

Here in Dutch Creek Park the trail splits a number of ways. To the north you can access a host of parks and open spaces across Cherry St. South takes you to the golf course, and to the east and north the trail takes you through Lafayette and beyond.

Tip by

B

27.1 km

End point

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Way Types & Surfaces

Way Types

17.2 km

5.07 km

4.51 km

325 m

Surfaces

14.8 km

5.18 km

4.71 km

1.60 km

726 m

117 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 (1,660 m)

Lowest point (1,570 m)

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Weather

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Today

Friday 10 July

30°C

14°C

43 %

Additional weather tips

Max wind speed: 21.0 km/h

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Frequently Asked Questions

What is the overall difficulty of the Broomfield and Louisville Loop Trail?

While the full 27 km (16.8 mi) route is rated as difficult due to its length, many individual sections of the Broomfield Trail and Louisville Loop Trail are generally easy to moderate. The terrain is mostly flat with some gentle inclines, though the Louisville Loop does feature a couple of slightly steeper sections with switchbacks that add a bit of challenge.

What kind of terrain and surfaces can I expect on the trail?

The trail features a mix of surfaces, primarily concrete and finely crushed stone or cement and gravel. You'll find well-maintained pathways suitable for hiking, with some sections offering ADA accessibility. While mostly flat, be prepared for a couple of slightly steeper sections with switchbacks on the Louisville Loop.

What are the main points of interest along the route?

The route offers diverse scenery and several notable highlights. You can enjoy views of open space, distant mountains, and the Front Range, especially from the View of Standley Lake and the Front Range. The trail passes by several lakes, including Stearns Lake, and through open spaces like Admor Open Space and Aquarius Open Space. Keep an eye out for the Bald Eagle Nest Viewing Area near Stearns Lake.

Does the trail intersect with other well-known paths?

Yes, the route incorporates significant portions of other official trails. You'll spend a considerable amount of time on the Coal Creek Trail, which makes up about 47% of the route. It also includes sections of the Rock Creek Trail (29%) and the Mary Miller Trail (8%).

Is the Broomfield and Louisville Loop Trail dog-friendly?

Yes, the trail is generally dog-friendly. However, always ensure your dog is kept on a leash and that you clean up after them. Specific rules may vary in different open space areas, so pay attention to local signage.

What is the best time of year to hike this trail?

The trail can be enjoyed year-round, but spring and fall offer particularly pleasant conditions with milder temperatures and beautiful scenery. In the fall, you might catch great views of pumpkin fields off Highway 287. Summer can be warm, so an early start is recommended, and winter hiking is possible, but be prepared for potentially icy sections.

Are there any permits or entrance fees required to access the trail?

No, there are no specific permits or entrance fees required to hike the Broomfield and Louisville Loop Trail. It primarily utilizes public open space and multi-use pathways.

Where can I park to access the Broomfield and Louisville Loop Trail?

Given that the trail connects various open spaces and communities, there are multiple access points with parking. Good options include parking areas near the Aquarius Open Space, which offers scenic views, or near parks that connect to the Broomfield Trail segments. Always check local signage for specific parking regulations.

What kind of wildlife might I see along the trail?

The trail passes through diverse habitats, offering opportunities for wildlife viewing. You might spot red-winged blackbirds and meadowlarks in the meadows, prairie dogs in grassy fields, and various waterfowl around Stearns Lake. The Bald Eagle Nest Viewing Area is a specific spot to look for raptors.

Are there any amenities like restrooms or water available along the route?

While the trail passes through several parks and near urban areas, specific amenities like restrooms and water fountains are not consistently available directly on the trail itself. It's advisable to carry sufficient water and plan your stops. The Louisville Loop does offer access to the Louisville Recreation Center and historic downtown Louisville, where facilities would be available.

Is the trail suitable for families with children?

Many sections of the Broomfield and Louisville Loop Trail are suitable for families, especially the generally flat and paved segments. However, the full 27 km route is quite long and rated difficult, which might be too challenging for younger children. Consider tackling shorter, individual segments of the Broomfield Trail or Louisville Loop for a more family-friendly experience.

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