more stats
4,281 ft
Distance
234 ft
Climb
-203 ft
Descent
00:09:12
Avg time
31 ft
Altitude change
6,137 ft
Altitude min
6,304 ft
Altitude max
6,268 ft
Altitude start
6,299 ft
Altitude end
0.7%
Grade
-51.5%
Grade max
31.2%
Grade min
2,221 ft
Distance climb
1,591 ft
Distance down
469 ft
Distance flat
00:09:12
Avg time

Fourmile Link Details

  • Activities
    • Mountain Bike
    • Hike
    • Trail Running
  • Riding Area
    Betasso Preserve
    Boulder, Colorado
  • Difficulty Rating
    Blue Rate
  • Local Popularity
    80 in Mountain Biking [+]
    • 50 in Trail Running
    • 75 in Hiking
  • Global Ranking
    #54244 in Mountain Biking [+]
    • #98773 in Trail Running
    • #102441 in Hiking
  • Trail Type
    Singletrack
  • Direction
    Both Directions
  • Climb Difficulty
    Blue
  • Physical Rating
    Moderate
  • Trail Visibility
    Always easy to follow
  • Dogs Allowed
    Yes
  • eBike Allowed
    No
  • Land Owner
    Boulder County Parks & Open Space

Trail trail is a bi-directional link from Four Mile Canyon road to the Benjamin Loop at Betasso. Trail is blue intermediate but there are two small staircases that most people walk.

Access Info

The Fourmile Link can be accessed 2.7 miles up Fourmile Canyon Drive from Boulder Canyon Drive. Look for a small pullout and a guardrail on the south side of the road.

Disclaimer

Trail closed to bikes on Wednesday and Saturdays.

Local Trail Association
Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 4 rides
  • 15 miles average
6 Months
  • 150 rides
  • 16 miles avg distance
All
  • 483 rides
  • Last: Sep 15, 2026
c1c2c3c4
January
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Status:
on Jun 27, 2026
Ideal
Avg: 4.33 (6 votes)
Your vote: 0

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      Directions to fourmile-link trailhead (40.038260, -105.350730)
      View on Discover Map

      Photos

      6 more »
      mtb
      613 |
      Apr 13, 2018 @ 7:40am
      Apr 13, 2018
      mtb
      204 |
      Aug 8, 2019 @ 12:46pm
      Aug 8, 2019
      mtb
      248 |
      Aug 8, 2019 @ 12:34pm
      Aug 8, 2019
      mtb
      222 |
      Aug 8, 2019 @ 12:30pm
      Aug 8, 2019

      Videos

      no videos have been added for Fourmile Link yet, add a video.

      Technical Trail Features (TTF)

      Trail Lists

      Routes with this trail

      34
      Super Betasso via Four Mile Featured
      ★ 5.0 • 15 miles • 1,506 ft • 7 • Loop •
      This is the easiest way to ride Betasso from town. This route starts on the west side of the paved Boulder...
      4.7 ★★★★★
      6 Ratings
      5 ★ 67%
      4 ★ 33%
      3 ★
      2 ★
      1 ★

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      Nearby Trails

      Betasso Preserve

      • By toddTF Pro Trailforks & contributors
      • #13664 - 5,249 views

      Frequently Asked Questions

      ▼ Where is Fourmile Link located?
      Fourmile Link is located in Betasso Preserve, Boulder, Colorado, United States. It is part of the Betasso Preserve trail network. The trailhead is located at coordinates 40.03826, -105.35073.
      ▼ How hard is Fourmile Link?
      Fourmile Link is rated as Blue difficulty. The physical rating is Moderate. The average grade is 0.7%. The climb difficulty is rated Blue.
      ▼ What is the elevation gain for Fourmile Link?
      Fourmile Link has 234 ft of elevation gain. The trail has 203 ft of elevation descent. The elevation ranges from 6,137 ft to 6,304 ft.
      ▼ Is Fourmile Link a point to point trail?
      Fourmile Link is not a point to point trail. The direction is Both Directions. The trail type is singletrack.
      ▼ How long is Fourmile Link?
      Fourmile Link is 4,281 ft long. The trail type is singletrack.
      ▼ Are dogs allowed on Fourmile Link?
      Yes, dogs are allowed on Fourmile Link. Please keep dogs on a leash where required and clean up after them.
      ▼ How do I access Fourmile Link? Where is the closest parking trailhead?
      The closest parking and trailhead locations to Fourmile Link are: View all parking locations in the area.
      ▼ How long does it take to ride Fourmile Link?
      Based on recorded activities, it takes an average of 9 minutes to ride Fourmile Link. The trail is 4,281 ft long. Actual times will vary based on fitness level, conditions, and pace. View recent activity logs for more details.
      ▼ How busy is Fourmile Link?
      Fourmile Link is a very popular trail. There have been 4,458 recorded activities on this trail. The trail has received 5,232 check-ins. View recent activity on this trail.

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