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Trail Conditions
- Unknown
- Snow Groomed
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Trail Flow (Ridden Direction)
Trailforks scans users activity logs to determine the most popular direction each trail is ridden. A good flowing trail network will have most trails flowing in a single direction according to their intension.
The colour categories are based on what percentage of users are riding a trail in its intended direction.
The colour categories are based on what percentage of users are riding a trail in its intended direction.
- > 96%
- > 90%
- > 80%
- > 70%
- > 50%
- < 50%
- bi-directional trail
- no data
Trail Last Used
Trailforks scans activity logs to determine the last time a trail was ridden.
- < 2 days
- < 1 week
- < 2 weeks
- < 1 month
- < 6 months
- > 6 months
Trail Ridden Direction
The intended direction a trail should be ridden.
- Downhill Only
- Downhill Primary
- Both Directions
- Uphill Primary
- Uphill Only
- One Direction
Contribute Details
Colors indicate trail is missing specified detail.
- Description
- Photos
- Description & Photos
- Videos
Trail Popularity ?
Trailforks scans activity logs to determine which trails are ridden the most in the last 9 months.
Trails are compared with nearby trails in the same city region with a possible 25 colour shades.
Think of this as a heatmap, more activities = more kinetic energy = warmer colors.
- most popular
- popular
- less popular
- not popular
ATV/ORV/OHV Filter
Max Vehicle Width
inches
US Cell Coverage
Legend
Radar Time
Activity Recordings
Trailforks uses anonymized public activity data.
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Activity Recordings
Trailforks uses anonymized public activity data.
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Winter Trails
Warning
A routing network for winter maps does not exist. Selecting trails using the winter trails layer has been disabled.
Missing Trails
Most Popular
Least Popular
Trails are colored based on popularity. The more popular a trail is, the more red. Less popular trails trend towards green.
Jump Magnitude Heatmap
Heatmap of where users jump on trails. Zoom in to see individual jumps, click circles to view jump details.
BC Backroad Status
![map legend]()
Service Road Atlas is a free to use, community-driven service for viewing and creating reports on the numerous back-country service roads around B.C. and Alberta.
Slope Aspect
Direction the slope faces
Trails Deemphasized
Trails are shown in grey.
Only show trails with no bike usage.
Suggested Layers
Based on selected activity type
Save the current map location and zoom level as your default home location whenever this page is loaded.
SaveBoulder trails and routes are listed on Trailforks with interactive trail maps, difficulty ratings, photos, and user-reported trail conditions. The Trailforks community has mapped hundreds of trails and shared hundreds of photos in this region. Supported activity types include Hiking, Trail Running, Mountain Biking, E-Biking, Horseback, Gravel Biking and Adaptive Biking. Popular destinations include Boulder Open Space, Lefthand OHV and Valmont Bike Park.
This is an auto-generated description of Boulder.
Login or register to submit a custom description.
Activities Click to view
- Mountain Bike
246 trails
- E-Bike
133 trails
- Gravel Bike
122 trails
- Adaptive Bike
69 trails
- Horse
128 trails
- Hike
375 trails
- Trail Running
375 trails
Region Details
- 56
- 22
- 54
- 46
- 46
- 19
- 3
Region Status
Open as of Aug 26, 2026
Stats
- Avg Trail Rating
- Trails (view details)
- 406
- Trails Mountain Bike
- 246
- Trails E-Bike
- 133
- Trails Gravel Bike
- 122
- Trails Adaptive Bike
- 69
- Trails Winter Fat Bike
- 1
- Trails Horse
- 128
- Trails Hike
- 375
- Trails Trail Running
- 375
- Trails Dirtbike/Moto
- 10
- Trails Observed Trials
- 2
- Trails ATV/ORV/OHV
- 5
- Trails Snowshoe
- 1
- Total Distance
- 302 miles
- Total Descent
- 55,392 ft
- Total Vertical
- 3,794 ft
- Highest Trailhead
- 8,862 ft
- Reports
- 10,872
- Photos
- 545
- Completed Counter
- 151,289
Articles
More Than Miles: Here’s How to Plan the Perfect Runcation
Aug 1, 2025 from outsideonline.com
Running trips—from Utah's desert to Patagonia's peaks—offer the most thrilling (and humbling) adventures this writer's ever experienced.
An Insider’s Guide to the Best Hikes in Boulder, Colorado
Feb 26, 2024 from outsideonline.com
After 25 years of hiking in his hometown of Boulder, guidebook author James Dziezynski reveals his all-time favorite treks in the area. Plus,...
Sub Regions
-
Betasso Preserve
- 4
- 1
-
Boulder Open Space
- 1
-
Boulder Valley Ranch / Boulder Reservoir
- 4
- 12
-
CU South Campus
- 5
- 5
- 1
-
Eldorado Canyon State Park
-
Lefthand OHV
- 9
- 35
- 14
- 3
-
Marshall Mesa/Doudy Draw/Flatirons Vista
- 16
- 4
-
Teller Farm Open Space
- 3
-
The People's Crossing Park
-
Valmont Bike Park
- 12
- 20
- 1
- 5
-
Walker Mountain
- 1
- 6
- 7
-
Walker Ranch
- 1
- 1
- 1
Popular Boulder Mountain Biking Trails
• 100 ★ 3.2 • 2 miles • 90 ft • 2,663 •
Mayhoffer Singltree is another connector piece of the Dirty Bismark loop. It was one of the final sections opened. The trail has a very nice easy grade and no rocks at all! It's fantastic for beginners and young 'uns.
• 100 ★ 3.9 • 3,675 ft • 165 ft • 1,970 •
The connects the popular and trails. While the loops are direction for bikes, the is bidirectional with some exposure and blind corners so caution is recommended. Going from Canyon to Benji, the trail descends to a drainage and then...
• 90 ★ 4.0 • 2 miles • 497 ft • 1,804 •
is directional for bikers, and the direction changes approximately every four weeks. Please follow posted signs. The preferred direction from the Link Loop is clockwise (not that you have a choice, just be excited if that's the...
• 95 ★ 3.0 • 1,420 ft • 12 ft • 1,692 •
Singletrack connector from to Springbook Loop.
• 95 ★ 4.0 • 1 mile • 240 ft • 1,686 •
This trail is the easier direction to climb the Springbrook Loop. The trail hugs the hillside and is also a flowy descent. Half way through it flattens out on the top of the mesa and has great views of the Flatirons. Then it climbs...
• 95 ★ 3.4 • 1 mile • 268 ft • 1,672 •
trail is a short trail that is relatively fast and technical. It is not a steep trail, but lots of small, loose rocks and turns exist. It is an uphill and downhill trail, but it is primarily for downhill. Hiking is also allowed so be...
• 100 ★ 3.0 • 3,990 ft • 12 ft • 1,669 •
A short section of mostly smooth singletrack connecting Community Ditch and .
• 100 ★ 3.0 • 2 miles • 335 ft • 1,619 •
The begins at the mouth of and is a 6' wide paved path for the first 1/2 mile. The trail then goes through an underpass under Drive and switched to crushed gravel. Running along , this is a very scenic and accessible trail just outside...
Boulder Mountain Bike Routes
Marshall Mesa Doudy Draw Loop Featured
★ 4.0 • 12 miles • 988 ft • 14 • Loop •
This route gives a great tour of the best trails Marshall Mesa has to offer. The ride starts at the main...
Marshall Mesa Beginner Ride Featured
★ 4.0 • 5 miles • 272 ft • 1 • Out & Back •
The Boulder Mountainbike Alliance's Recommendation for Easiest Ride at Marshall Mesa. People in Boulder...
North Boulder MTB Featured
★ 5.0 • 12 miles • 854 ft • 5 • Loop •
Starting in 2024, singletrack options north of Boulder just got a whole lot better! The opened in July and...
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...
Betasso Loops Featured
★ 3.4 • 7 miles • 950 ft • 9 • Loop •
Betasso Preserve is a great intermediate area close to downtown Boulder. Because of its popularity, bikes...
Walker Out-and-Back to Stairs Featured
★ 3.5 • 11 miles • 2,465 ft • 3 • Out & Back •
This is an advanced ride, due to steep climbs and lots (and lots and lots) of rocks. Walker Ranch can be...
Photos of Boulder Mountain Bike
Videos of Boulder Mountain Bike
Current Trail Warnings
| status | trail | date | condition | user | info |
|---|---|---|---|---|---|
| Flying Squirrel | Aug 26, 2026 @ 6:33pm (America/Denver) Aug 26, 2026 | Ideal | Lleopalma | E-Bike I went to check this trail climbing with... |
Recent Trail Reports
| status | trail | date | condition | info | user |
|---|---|---|---|---|---|
| Coal Seam | Aug 27, 2026 @ 6:30pm (America/Denver) Aug 27, 2026 | Dry | tshralper | ||
| Doudy Draw | Aug 27, 2026 @ 6:30pm (America/Denver) Aug 27, 2026 | Dry | tshralper | ||
| Old Coal Seam | Aug 27, 2026 @ 6:30pm (America/Denver) Aug 27, 2026 | Dry | tshralper | ||
| Springbrook Connector | Aug 27, 2026 @ 6:30pm (America/Denver) Aug 27, 2026 | Dry | tshralper | ||
| Springbrook South | Aug 27, 2026 @ 6:30pm (America/Denver) Aug 27, 2026 | Dry | tshralper | ||
| Springbrook North | Aug 27, 2026 @ 6:30pm (America/Denver) Aug 27, 2026 | Dry | tshralper | ||
| Community Ditch - West | Aug 27, 2026 @ 6:30pm (America/Denver) Aug 27, 2026 | Dry | tshralper | ||
| Coalton | Aug 26, 2026 @ 8:44am (America/Denver) Aug 26, 2026 | Ideal | KiltedTrail | ||
| Community Ditch - East | Aug 20, 2026 @ 5:45pm (America/Denver) Aug 20, 2026 | Dry | tshralper | ||
| Marshall Valley | Aug 20, 2026 @ 5:45pm (America/Denver) Aug 20, 2026 | Dry | tshralper |
Activity Feed
| username | action | type | title | date |
|---|---|---|---|---|
| cfarnz | wishlist | region | activity #103066004 | Sep 4, 2026 @ 9:05pm 23 hours |
| m323846 | ridden | trail | activity #103000039 and 1 more | Sep 3, 2026 @ 7:32pm 2 days |
| tomthetrailrider | wishlist | route | activity #102920744 | Sep 2, 2026 @ 2:53pm Sep 2, 2026 |
| Pkfire | comment | trail | activity #102865820 | Sep 1, 2026 @ 6:59pm Sep 1, 2026 |
| Ivanl95 | wishlist | route | activity #102816991 | Sep 1, 2026 @ 6:40am Sep 1, 2026 |
Recent Comments
| username | type | title | comment | date |
|---|---|---|---|---|
| trail | top third is getting pretty blown out. could... | Sep 1, 2026 @ 6:59pm Sep 1, 2026 | ||
| trail | Not sure what this used to be like, but now... | Jun 13, 2026 @ 3:08pm Jun 13, 2026 | ||
| trail | “What trails do you want to do... | Jun 2, 2026 @ 11:51am Jun 2, 2026 | ||
| report | Marshall mesa and Dowdy all dry and running great | Apr 19, 2026 @ 10:05am Apr 19, 2026 | ||
| trail | Shit rips | Apr 14, 2026 @ 9:37am Apr 14, 2026 |
Local Badges
-
Completionist0 awarded -
Epic Ride 50k10,428 awarded -
Top 10 Trails53 awarded -
10 Black Trails638 awarded -
10 Expert Trails103 awarded -
Completionist0 awarded
Bike & Skill Parks
| name | type | city | rating |
|---|---|---|---|
| Valmont Bike Park | skill park | Boulder |
Activity Type Stats
| activitytype | trails | distance | descent | descent distance | total vertical | rating | global rank | state rank | photos | reports | routes | activity logs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mountain Bike | 246 | 198 miles | 30,938 ft | 88 miles | 3,793 ft | #85 | #32 | 429 | 10,681 | 35 | 142,866 | |
| E-Bike | 133 | 120 miles | 9,386 ft | 51 miles | 3,793 ft | #878 | #783 | 6,998 | 2 | 4,934 | ||
| Gravel Bike | 122 | 130 miles | 9,131 ft | 52 miles | 3,757 ft | #259 | #83 | 1,883 | 4 | 2,161 | ||
| Adaptive Bike | 69 | 75 miles | 4,895 ft | 32 miles | 3,077 ft | #348 | #128 | 1,496 | 1 | 9 | ||
| Winter Fat Bike | 1 | 1 mile | 23 ft | 3,888 ft | 20 ft | #106 | #44 | 1 | 1 | 3 | ||
| Horse | 128 | 118 miles | 16,995 ft | 52 miles | 3,652 ft | #221 | #354 | 1,551 | 17 | 7 | ||
| Hike | 375 | 298 miles | 53,812 ft | 129 miles | 3,793 ft | #107 | #62 | 110 | 9,385 | 37 | 21,800 | |
| Trail Running | 375 | 298 miles | 53,812 ft | 129 miles | 3,793 ft | #155 | #68 | 4 | 9,385 | 34 | 24,704 | |
| Dirtbike/Moto | 10 | 17 miles | 3,415 ft | 11 miles | 1,991 ft | 1,173 | 1 | 22 | ||||
| Observed Trials | 2 | 7 miles | 1,260 ft | 5 miles | 791 ft | 31 | 2 | |||||
| ATV/ORV/OHV | 5 | 12 miles | 1,739 ft | 7 miles | 1,955 ft | 1,173 | 1 | |||||
| Snowshoe | 1 | 899 ft | 43 ft | 3 | 17 | 24 |
Frequently Asked Questions About Boulder
▼
What are the best places to ride in Boulder?
Boulder has 15 areas to explore for mountain biking. The top rated areas are:
▼
What are the highest rated mountain biking trails in Boulder?
The highest rated mountain biking trails in Boulder are:
- Slopestyle L (4.6/5)
- Corkscrew (4.5/5)
- GZA (4.5/5)
- Brown Town (4.4/5)
- Fourmile Link (4.3/5)
▼
Where can I park to ride in Boulder?
▼
What is the longest trail in Boulder?
The longest trail in Boulder is Walker Ranch Loop at 7.7 miles. View all trails sorted by distance.
Activities
Trails
Points of Interest
- Eldorado Canyon Visitor Center Information
- Reflection Point Viewpoint
- Anemone Point Viewpoint
- Mallory Cave Sight
- Royal Arch Viewpoint
- Shelter Cabin
- Crags Hotel Ruins Sight
- Continental Divide Overlook Viewpoint
- Shirttall Peak Summit
- South Boulder Peak Summit
- Scar Top Mountain (8,776 ft)
- Twin Sisters Peak (8,694 ft)
- South Boulder Peak (8,543 ft)
- By canadaka
Trailforks & contributors - Admins: BMA, IMBA, WendyBMA, BMA, mattoid, amrosen, getvert, mpopetz, Pumpntrail, andrewbikeboulder
- #4922 - 42,184 views
- boulder activity log | embed map of Boulder mountain bike trails | boulder mountain biking points of interest
Downloading of trail gps tracks in kml & gpx formats is enabled for Boulder.
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