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Routes
Bike touring routes & trails
United States
Colorado
Boulder County
Longmont

Longmont, Boulder Reservoir and Gunbarrel loop via the LOBO Trail

Routes
Bike touring routes & trails
United States
Colorado
Boulder County
Longmont

Longmont, Boulder Reservoir and Gunbarrel loop via the LOBO Trail

Moderate

4.5

(9317)

12,374

riders

Longmont, Boulder Reservoir and Gunbarrel loop via the LOBO Trail

03:08

47.4km

210m

Cycling

Cycle the moderate 29.4-mile LOBO Trail loop, connecting Longmont, Boulder Reservoir, and Gunbarrel with scenic foothills views.

Last updated: February 26, 2026

Tips

Includes a segment in which cycling is not permitted

After 45.6 km for 104 m

Waypoints

A

Start point

Parking

Get Directions

1

19.6 km

51st Street (Gravel to Eagle Trailhead)

Highlight (Segment) • Trail

This section of 51st Street from the main Boulder Reservoir parking area to the Eagle Trail Trailhead (which is also where 51st turns into 55th street) is a fun section …

Tip by

2

23.9 km

Boulder Reservoir

Highlight • Lake

With lakeside trails and far-reaching views of the foothills, cycling alongside Boulder Reservoir is wonderful. The traffic-free trails are great for families, group rides and solo expeditions. There are plenty of great picnic spots too, should you need a break.

Tip by

3

29.0 km

Twin Lakes

Highlight • Lake

From this spot by the water, you get great views of the Flatirons and foothills of Boulder. If you ride by in the morning, the water is often still, making for great photographs.

Tip by

4

30.8 km

Mural of the Full Moon Wolves

Highlight • Structure

Just as you enter the tunnel, which crosses under the busy Lookout Road, there is a vibrant mural of wolves and the Flatirons.

Tip by

5

33.9 km

Great views of the Foothills

Highlight • Viewpoint

Great viewpoint along the LOBO Regional Trail. There is a bench for you to stop and take a break to enjoy the vistas.

Tip by

B

47.4 km

End point

Parking

Loading

Way Types & Surfaces

Way Types

17.4 km

13.0 km

7.16 km

5.77 km

3.93 km

< 100 m

< 100 m

Surfaces

17.9 km

17.3 km

7.60 km

4.31 km

303 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 (1,600 m)

Lowest point (1,510 m)

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Weather

Powered by Foreca

Today

Thursday 7 May

23°C

-1°C

13 %

Additional weather tips

Max wind speed: 12.0 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 Longmont, Boulder Reservoir and Gunbarrel loop?

You can find parking at various points along the route, including trailheads in Longmont, near the Boulder Reservoir, and in Gunbarrel. Specific parking areas are available at Boulder County Open Space trailheads. Always check local signage for any parking restrictions.

Are there any permits or fees required for this trail?

Generally, there are no permits or entrance fees required to access the LOBO Trail itself. However, some specific areas within Boulder County Open Space, such as the Boulder Reservoir, may have fees for certain activities or vehicle access. It's always a good idea to check the Boulder County Parks & Open Space website for the latest regulations.

What kind of terrain and surfaces can I expect on this cycling loop?

The loop offers a diverse cycling experience with a mix of surfaces. You'll encounter primarily crushed stone and paved sections, with some segments featuring gravel. While mostly smooth, some parts may be unpaved. There are also a few short on-street connections required to complete the loop. A hybrid or gravel bike is often recommended for optimal comfort across these varied surfaces.

Is this cycling loop suitable for beginners?

Yes, this loop is generally considered suitable for beginners and recreational riders. Many sections are flat with minimal elevation gain, making it an easy cruise. While the overall difficulty is rated as moderate, this is largely due to its length. The LOBO Trail itself has an easy physical rating, making it accessible for those new to touring cycling.

How long does it typically take to complete this cycling loop?

This touring bicycle loop is approximately 47.35 kilometers (29.4 miles) long. On average, it takes about 3 hours and 8 minutes to complete, depending on your pace and how often you stop to enjoy the scenery.

What scenic highlights will I see along the way?

The route offers a variety of picturesque scenery. You'll enjoy Great views of the Foothills and the iconic Flatirons, especially near the 51st Street (Gravel to Eagle Trailhead) section. The loop also passes by the beautiful Boulder Reservoir and Twin Lakes, traverses farmland with grazing cows, and features open fields with wildflowers. You might even spot the Mural of the Full Moon Wolves.

Does the trail intersect other well-known paths?

Yes, the route utilizes and connects with several other trails. The primary path is the Longmont-to-Boulder (LOBO) Regional Trail, which makes up a significant portion of the loop. You'll also ride on sections of the Longmont Loop - South, Left Hand Creek Trail, Niwot Loop Trail, and Boulder Reservoir Trail, among others.

Can I bring my dog on the LOBO Trail loop?

Yes, the LOBO Trail system is generally dog-friendly, but dogs must be kept on a leash at all times. There is a short exception near Twin Lakes Open Space where e-bikes are generally allowed, but always be mindful of specific regulations in different sections, especially within Boulder County Open Space areas.

What is the best time of year to cycle this loop?

The best time to cycle this loop is typically during the spring, summer, and fall months when the weather is mild and the scenery is vibrant. While possible in winter, some shadier sections of the LOBO Trail can retain snow and ice, making conditions more challenging. Always check local weather conditions before heading out.

Are there amenities like cafes or restrooms along the route?

Yes, as the loop connects Longmont, Niwot, Gunbarrel, and Boulder, you'll find various amenities in these towns. This includes cafes, restaurants, and public restrooms. The Boulder Reservoir area also offers facilities. Planning your stops in advance can enhance your touring experience.

What kind of wildlife might I encounter on the trail?

Given the trail's varied landscape through open spaces, farmlands, and lakeside areas, you might spot various local wildlife. This could include birds, small mammals, and possibly grazing livestock in the agricultural sections. Keep an eye out, especially during quieter times of the day.

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