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Routes
Hiking trails & Routes
United States
Colorado
Boulder County
Longmont

Open Sky Loop

Moderate

4.8

(1500)

7,109

hikers

Open Sky Loop

02:11

8.47km

50m

Hiking

Hike the 5.3-mile Open Sky Loop in Lagerman Agricultural Preserve for open views, diverse wildlife, and easy gravel paths.

Last updated: February 26, 2026

Waypoints

A

Start point

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1

1.14 km

Lagerman Agricultural Preserve

Highlight • Natural

The Lagerman Agricultural Preserve and Reservoir is a small nature preserve that birders, boaters, picnickers, bikers, runners, and dog-walkers can all enjoy. You get great views of the foothills over …

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2

3.64 km

Open Sky Loop

Highlight (Segment) • Trail

The Open Sky Loop is a popular trail in the Lagerman Agricultural Preserve. It provides foot and cycle traffic a nice way to circumnavigate the preserve to enjoy the wildlife and landscape views.

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8.47 km

End point

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Way Types & Surfaces

Way Types

8.33 km

109 m

< 100 m

Surfaces

7.96 km

285 m

109 m

< 100 m

< 100 m

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Elevation

Elevation

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Monday 25 May

29°C

10°C

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This route was planned by komoot.

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Frequently Asked Questions

Where can I park to access the Open Sky Loop trail?

The Open Sky Loop trail is located within the Lagerman Agricultural Preserve. There is designated parking available at the trailhead. For more detailed directions, you can check local resources like visitlongmont.org.

How long does it typically take to hike this loop?

The Open Sky Loop is approximately 8.5 kilometers (5.3 miles) long. Most hikers can expect to complete the entire loop in about 2 hours and 11 minutes, depending on their pace and how often they stop to enjoy the scenery.

Is the Open Sky Loop suitable for beginners or families with children?

Yes, this trail is consistently rated as easy to easy/intermediate and is very suitable for beginners and families. It features minimal elevation changes and a non-technical gravel path, making it accessible for a wide range of fitness levels.

What is the terrain like on the trail?

The trail is primarily a gravel path with gentle climbs and descents, characterized by rolling hills and a doubletrack surface. It meanders through pastures and past lakes. Be aware that it traverses open agricultural land, so there is a notable lack of shade. There are also a few road crossings along the loop.

What kind of wildlife or natural features can I expect to see?

As its name suggests, the trail offers expansive 'open sky' views of the surrounding mountains and farm country. The preserve is rich in wildlife, especially birds, due to its wetlands and diverse habitats. You might spot osprey, various migrating bird species, and other local fauna, making it an excellent spot for birdwatching.

Is the Open Sky Loop dog-friendly?

Yes, the Open Sky Loop is a multi-use trail that welcomes dogs. Please ensure your dog is kept on a leash at all times to protect the local wildlife and ensure a pleasant experience for all trail users.

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

The trail can be enjoyed year-round. However, due to the lack of shade, spring and fall offer more comfortable temperatures. In summer, it's best to go early in the morning or late in the afternoon to avoid the midday sun. Winter hiking is also possible, but be prepared for potentially cold and windy conditions.

Do I need a permit or pay an entrance fee to access the Lagerman Agricultural Preserve?

No, there are no permits or entrance fees required to access the Lagerman Agricultural Preserve or the Open Sky Loop trail. It is publicly accessible for recreation and wildlife observation.

Does the Open Sky Loop intersect with other trails?

Yes, while the Open Sky Loop forms the main route, sections of the trail also connect with or run alongside other paths such as Clover Basin Dr, Dry Creek Trail, Lagerman Trail, and Link Trail.

What makes the Open Sky Loop a notable trail in the area?

This trail is notable for offering a family-friendly outdoor experience that allows users to 'grind some gravel and avoid cars' in a safe environment. Its location within the Lagerman Agricultural Preserve highlights successful land preservation efforts. The expansive views, diverse birdlife, and accessible terrain make it a distinctive and enjoyable trail.

What should I bring with me when hiking the Open Sky Loop?

Given the lack of shade, it's highly recommended to bring plenty of water, sun protection (hat, sunscreen), and sunglasses. Comfortable walking shoes are essential for the gravel path. Binoculars can enhance your experience if you're interested in birdwatching.

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