Trail Running in Boulder, CO

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11 reviews

Displaying all 11 results within 100 miles
  1. Some amazing views line this rather nontechnical 12.5-mile trail.

    Difficulty
    2 of 5 diamonds
    From Downtown
    12.2 miles
    Duration
    2.5 hours +/-
  2. Sage Loop is one of the best running trails in Boulder, instantly transporting you out of the city to gorgeous farmland and spacious views.

    Difficulty
    2 of 5 diamonds
    From Downtown
    4.5 miles
    Duration
    20-30 min. per loop
  3. Magnolia Road offers a high-altitude run that escapes the city and opens up au natural interval training.

    Difficulty
    4 of 5 diamonds
    From Downtown
    3.8 miles
    Duration
    2-4 hours
  4. A loop trail/road run totaling 5.3 miles around one of Boulder’s most popular summer recreation spots.

    Difficulty
    1 of 5 diamonds
    From Downtown
    4.5 miles
    Duration
    The 5.3 mile circuit is well maintained and should take roughly 45 minutes to complete when running at an 8:00 minute/mile pace.
  5. One of Boulder’s newest trails, Lion’s Lair is also one of the city’s best. The smooth dirt trail boasts breathtaking views, a perfect grade, and a relief from the congestion of nearby Mt. Sanitas.

    Difficulty
    3 of 5 diamonds
    From Downtown
    2.3 miles
    Duration
    The 2.2 mile trail should take 30 minutes or so to ascend at a conservative uphill pace. That time is easily cut in half for the speedy downhill.
  6. A local mecca for mountain bikers, these 7.1 mile loop trails are also a must for any trail runner looking for big mountain views and well-groomed single track trail that’s still close to town.

    Difficulty
    3 of 5 diamonds
    From Downtown
    3.3 miles
    Duration
  7. Walker Ranch is a 7.8 mile trail running loop a few miles beyond Flagstaff summit. With 1,624 ft . elevation gain, technical twists and obstacles including a rugged staircase, coupled with gorgeous views across Crescent Meadows, this loop is a favorite among trail runners in the Boulder area.

    Difficulty
    4 of 5 diamonds
    From Downtown
    5.4 miles
    Duration
    1.5-2 hours
  8. All of the trails at Hall Ranch offer great options for trail running, but for runners who want some extra solitude (without any bikers to contend with), the 4.7 mile Nighthawk Trail is a real gem.

    Difficulty
    3 of 5 diamonds
    From Downtown
    14.3 miles
    Duration
  9. An out-and-back trail run totaling 13.4 miles and 3,200 feet in elevation changes.

    Difficulty
    3 of 5 diamonds
    From Downtown
    1.8 miles
    Duration
  10. Meyers Homestead (also known as Meyers Gulch) is the sister trail to the more difficult and infamous trail, Walker Ranch. Meyers Homestead is a wide out-and-back trail (2.6 miles each way) that takes you through fall foliage in the autumn, and blossoming flowers in the summer.

    Difficulty
    3 of 5 diamonds
    From Downtown
    5.3 miles
    Duration
    1-2 hours
  11. Mount Sanitas is a Boulder institution. While the trail is only 3.1 miles roundtrip, the climb is a doozy with 1,343 feet of elevation gain.

    Difficulty
    3 of 5 diamonds
    From Downtown
    0.9 miles
    Duration
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