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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
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Activities
- Mountain Bike
- Hike
- Trail Running
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Riding AreaBetasso Preserve
Boulder, Colorado -
Difficulty Rating
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Local Popularity80 in Mountain Biking [+]
- 55 in Trail Running
- 50 in Hiking
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Global Ranking
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Trail TypeSingletrack
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DirectionBoth Directions
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Climb DifficultyBlue
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Physical RatingModerate
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Trail VisibilityAlways easy to follow
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Dogs AllowedYes
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eBike Allowed
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Land Owner
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
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Please consider joining or donating to the local trail association to supportDonate to earn trail karma!
trail development & maintenance.
Traditionally Indigenous Territory
Recent Activity on Trail
Past Week
- 8 rides
- 16 miles average
6 Months
- 92 rides
- 16 miles avg distance
All
- 398 rides
- Last: Jun 23, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
Fourmile Link Trail Reports
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Trail Conditions
- Unknown
- Snow Groomed
- Snow Packed
- Snow Covered
- Snow Cover Partial
- Freeze/thaw Cycle
- Icy
- Prevalent Mud
- Wet
- Variable
- Ideal
- Dry
- Very Dry
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The colour categories are based on what percentage of riders are riding a trail in its intended direction.
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- > 90%
- > 80%
- > 70%
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- < 50%
- bi-directional trail
- no data
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- > 6 months
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- Both Directions
- Uphill Primary
- Uphill Only
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Directions to fourmile-link trailhead
(40.038260, -105.350730)
Photos
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Videos
no videos have been added for Fourmile Link yet, add a video.
Trail Lists
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Boulder
6 trails
Routes with this trail
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...
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Nearby Trails
- Benjamin Loop 1 mile
- Pines To Peaks Loop 1 mile
- Loop Link 1 mile
- Betasso (parking Lot Connector) 2 miles
- Canyon Loop 3 miles
- By todd
Trailforks & contributors - #13664 - 4,978 views
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Frequently Asked Questions About Fourmile Link
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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.
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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.
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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.
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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.
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