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Routes
Running Trails
United States
Colorado
Boulder County

Boulder

The best running trails around Boulder

4.4

(27)

7,839

runners

356

runs

Jogging around Boulder offers access to diverse landscapes, from the iconic Flatirons to the foothills of the Rocky Mountains. The region features extensive trail systems, including paved paths along Boulder Creek and challenging mountain ascents. This area is characterized by its prominent rock formations, varied elevation changes, and numerous open spaces, providing a range of running environments.

Best jogging routes around Boulder

  • The most popular jogging route is Mount Sanitas via Lion's Lair loop, a 6.8 miles (10.9 km) trail that takes 1 hour 45 minutes to complete. This route features a steep ascent and offers panoramic views of Boulder and the Continental Divide.
  • Another top favourite among local runners is Boulder Reservoir Loop Trail, a moderate 5.3 miles (8.5 km) path. This trail is generally flat, providing scenic water views and backdrops of the Flatirons.
  • Local runners also love the Boulder Valley Ranch Loop, a 6.6 miles (10.6 km) trail leading through open spaces and rolling terrain, often completed in about 1 hour 9 minutes.
  • Jogging around Boulder is defined by its iconic Flatirons, Rocky Mountains foothills, and the Boulder Creek path. The network offers options for various ability levels, from gentle paths to challenging mountain ascents.
  • The routes in Boulder are highly rated by the komoot community with an average score of 4.2 stars from more than 20 reviews. More than 7000 runners have used komoot to explore Boulder's varied terrain.

Last updated: April 25, 2026

275

runners

#1.

Mount Sanitas via Lion's Lair loop

10.9km

01:45

480m

480m

Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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Hard

167

runners

Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate
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156

runners

Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

Hard

135

runners

Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

Hard

5.0

(1)

58

runners

10.6km

01:09

120m

120m

Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate
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Popular around Boulder

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Tips from the Community

Halbschuh
July 6, 2025, View of Red Rocks

Very nice view of the surrounding area.

Translated by Google

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Great view of the red sandstone rock formations in the area. There are several trails that loop through, getting you up close with several rock formations.

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Boulder Valley Ranch Pond, nestled in a serene natural landscape outside Boulder, captivates with its tranquil waters and surrounding wilderness. A haven for diverse wildlife, it offers a peaceful retreat for nature enthusiasts.

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The Boulder Valley Ranch Pond is one of two bodies of water within Boulder Valley Ranch (the other is Mesa Reservoir). This smaller reservoir has a beautiful mountain backdrop and is a good place to cool off the pets on warmer days, as a lot of the trails in the Ranch area don't offer much shade.

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Zachary
November 17, 2023, Mesa Rerservoir

The trails around the reservoir are dirt doubletrack with great views out to the Flatirons. There are lots of branching trails here to explore with no fear of getting lost.

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Matthew
November 12, 2023, Coot Lake

Coot Lake lies to the north of Boulder Reservoir. The Boulder Reservoir Trail cuts between the two bodies of water and offers access to both.

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Matthew
November 12, 2023, Boulder Reservoir

Boulder Reservoir is sustained by two interconnecting dam walls. The water is open to fishing and swimming (in certain areas), and the trails around the lake are used heavily by cyclists, runners, and walkers. If completing a clockwise loop around the reservoir, there are several miles on the road after passing over the southern dam.

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Jamie S.
November 12, 2023, 51st Street

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 of gravel with a nice downhill from the pavement to a short, punchy hill to the trailhead. You get great views over Boulder Valley Ranch to the foothills and Flatirons west and southwest of this section of road.

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Frequently Asked Questions

How many running routes are available around Boulder?

Boulder offers an extensive network of over 340 running routes, catering to all levels of experience. You'll find everything from gentle, paved paths to challenging mountain ascents.

Are there any easy, flat running routes suitable for beginners or a relaxed jog?

Yes, for an easy and scenic run, consider the Boulder Creek Path, an 8-mile paved trail following the creek. Another great option is the Boulder Reservoir Loop Trail, which is a moderate 5.3-mile loop offering beautiful water views and Flatirons backdrops, generally flat and accessible. The Wonderland Lake Loop is also a gentle 1.75-mile dirt trail with minimal elevation.

What are some challenging running trails in Boulder with significant elevation gain?

For a demanding workout, the Mount Sanitas via Lion's Lair loop is a popular choice, featuring a steep ascent and panoramic views. The Mount Sanitas Trail itself is known for its 1,256 feet of vertical gain. Other challenging options include the Flatirons Trail and Royal Arch Trail, both accessible from Chautauqua Park, and Dakota Ridge for hill repeats.

Can I find loop running trails in Boulder?

Absolutely! Many routes in Boulder are loops. Besides the Boulder Reservoir Loop Trail, the Boulder Valley Ranch Loop is a fantastic 6.6-mile option through open spaces. The Wonderland Lake Loop is also a shorter, gentle loop.

Are there running routes in Boulder that are family-friendly?

Yes, several routes are suitable for families. The Boulder Creek Path is excellent for all ages due to its flat, paved surface. The Wonderland Lake Loop offers a gentle, scenic dirt trail experience. For a slightly longer but still accessible option, the Bobolink Trail is a flat, out-and-back route along South Boulder Creek.

What kind of scenic views or landmarks can I expect along the running routes?

Boulder's routes are renowned for their stunning scenery. You'll frequently encounter the iconic Flatirons, the majestic Rocky Mountains foothills, and the serene Boulder Creek. Many trails, like those around Chautauqua Park, offer panoramic views of the Boulder Valley. You can also explore natural attractions such as Boulder Reservoir or Twin Lakes.

Are there any dog-friendly running routes in Boulder?

Boulder's Open Space and Mountain Parks generally welcome dogs, but specific regulations vary by trail, often requiring leashes or voice and sight control permits. Always check local signage or the Boulder Open Space and Mountain Parks website for the most current rules before heading out with your dog.

What do other runners enjoy most about jogging in Boulder?

The running routes in Boulder are highly rated by the komoot community, with an average score of 4.2 stars from over 30 reviews. Runners frequently praise the diverse landscapes, from the dramatic Flatirons to the peaceful creekside paths, and the well-maintained trail systems that cater to all fitness levels.

Are there shaded running trails for summer jogs?

While many trails in Boulder's open spaces can be exposed, routes along Boulder Creek Path offer some tree cover, providing a cooler experience. For trail running, some sections of the foothills trails might offer intermittent shade, but it's always wise to run early or late in the day during summer and carry plenty of water.

What are the options for parking near Boulder's running trails?

Many popular trailheads, such as Chautauqua Park and the Boulder Reservoir, have designated parking areas. However, these can fill up quickly, especially on weekends. It's advisable to arrive early or consider alternative transportation. Some routes, particularly those closer to residential areas, may have street parking available.

Can I access Boulder's running trails using public transport?

Yes, Boulder has a good public transportation system. Many trailheads, including Chautauqua Park and access points to the Boulder Creek Path, are reachable via local bus routes. Planning your trip with the RTD (Regional Transportation District) website can help you find the most convenient bus stops near your desired running route.

Are there any long-distance running routes in Boulder?

For longer runs, the Mesa Trail offers a substantial 13.1-mile route connecting Chautauqua to South Boulder, featuring rolling terrain and stunning Flatiron views. You can also combine various trails within the Open Space and Mountain Parks to create extended loops or out-and-back runs tailored to your desired distance.

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