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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
Trail Flow (Ridden Direction)
Trailforks scans users ridelogs 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 riders are riding a trail in its intended direction.
The colour categories are based on what percentage of riders are riding a trail in its intended direction.
- > 96%
- > 90%
- > 80%
- > 70%
- > 50%
- < 50%
- bi-directional trail
- no data
Trail Last Ridden
Trailforks scans ridelogs 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 ridelogs 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 rides = more kinetic energy = warmer colors.
- most popular
- popular
- less popular
- not popular
ATV/ORV/OHV Filter
Max Vehicle Width
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Activity Recordings
Trailforks users anonymized public ridelogs from the past 6 months.
- mountain biking recent
- mountain biking (>6 month)
- hiking (1 year)
- moto (1 year)
Activity Recordings
Trailforks users anonymized public skilogs from the past 12 months.
- Downhill Ski
- Backcountry Ski
- Nordic Ski
- Snowmobile
Winter Trails
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A routing network for winter maps does not exist. Selecting trails using the winter trails layer has been disabled.
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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 riders jump on trails. Zoom in to see individual jumps, click circles to view jump details.
Trails Deemphasized
Trails are shown in grey.
Only show trails with NO bikes.
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Activities Click to view
- Mountain Bike
189 trails
- E-Bike
76 trails
- Horse
117 trails
- Hike
334 trails
- Trail Running
337 trails
Region Details
- 45
- 26
- 42
- 25
- 30
- 12
- 2
Region Status
Caution as of 5 hoursStats
- Avg Trail Rating
- Trails (view details)
- 327
- Trails Mountain Bike
- 190
- Trails E-Bike
- 76
- Trails Horse
- 117
- Trails Hike
- 337
- Trails Trail Running
- 337
- Trails Dirtbike/Moto
- 2
- Trails Observed Trials
- 2
- Trails ATV/ORV/OHV
- 2
- Trails Snowshoe
- 1
- Total Distance
- 272 miles
- Total Descent
- 48,428 ft
- Total Vertical
- 3,408 ft
- Highest Trailhead
- 8,476 ft
- Reports
- 9,577
- Photos
- 465
- Ridden Counter
- 106,761
Articles
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
- 7
- 1
-
CU South Campus
- 5
- 5
- 1
-
Eldorado Canyon State Park
-
Lefthand OHV
- 6
- 26
- 10
- 2
-
Marshall Mesa/Doudy Draw/Flatirons Vista
- 16
- 4
-
Teller Farm Open Space
- 3
-
The People's Crossing Park
-
Valmont Bike Park
- 7
- 8
- 2
-
Walker Ranch
- 1
- 1
- 2
Popular Boulder Mountain Biking Trails
Boulder Mountain Bike Routes
title | rating | distance |
---|---|---|
Marshall Mesa Doudy Draw Loop | 19.4 km | |
Betasso Loops | 11.3 km | |
Super Betasso via Four Mile | 23.7 km | |
North Boulder MTB | 19.3 km | |
Marshall Mesa Beginner Ride | 8.0 km | |
Lil' Burrito | 65.3 km | |
Walker Out-and-Back to Stairs | 17.3 km | |
No Walker Walker | 24.7 km | |
Marshall Mesa - Beginner Loop | 7.7 km | |
North Sky | 13.5 km |
Photos of Boulder Mountain Bike
trail: Springbrook North
13 |
Oct 10, 2024 @ 1:29pm
Oct 10, 2024
trail: Springbrook North
9 |
Oct 10, 2024 @ 1:29pm
Oct 10, 2024
trail: Springbrook North
7 |
Oct 10, 2024 @ 1:29pm
Oct 10, 2024
trail: Rattlesnake Gulch
369 |
Mar 9, 2019 @ 7:47am
Mar 9, 2019
trail: Walker Ranch Loop
913 |
Mar 9, 2019 @ 7:37am
Mar 9, 2019
trail: Canyon Loop
748 |
Apr 13, 2018 @ 7:40am
Apr 13, 2018
trail: Fourmile Link
460 |
Apr 13, 2018 @ 7:40am
Apr 13, 2018
trail: Mayhoffer-Singletree
606 |
Jun 6, 2017 @ 1:31pm
Jun 6, 2017Videos of Boulder Mountain Bike

trail: Deadass
65 |
Jan 12, 2024

trail: David Lee Roth
193 |
Nov 8, 2023

trail: Slopestyle
41 |
Nov 8, 2023

trail: Lefthand Access 2
|
Mar 4, 2023

trail: Lefthand Access 1
|
Mar 3, 2023

trail: Valmont Paved Pumptrack
|
Mar 28, 2022

trail: Hot Lap
4:02 |
272 |
Jun 3, 2020

trail: Lefthand Access 1
0:17 |
702 |
May 8, 2020
Current Trail Warnings
status | trail | date | condition | user | info |
---|---|---|---|---|---|
North Sky Trail | Feb 9, 2025 @ 9:38pm 13 hours | Prevalent Mud | WendyBMA BMA | Open but still fairly muddy, not recommended. | |
Eagle (West) | Feb 9, 2025 @ 9:38pm 13 hours | Prevalent Mud | WendyBMA BMA | Open but still fairly muddy, not recommended. | |
Deadass | Feb 5, 2025 @ 9:51am Feb 5, 2025 | Snow Cover Partial | thegb1212 | E-Bike Snow drifts and mud throughout the top... |
Recent Trail Reports
status | trail | date | condition | info | user |
---|---|---|---|---|---|
Marshall Valley | Feb 10, 2025 @ 5:56am 5 hours | Wet | misha7010 | ||
Coal Seam | Feb 10, 2025 @ 5:54am 5 hours | Wet | misha7010 | ||
Greenbelt Plateau | Feb 10, 2025 @ 5:53am 5 hours | Dry | misha7010 | ||
High Plains | Feb 10, 2025 @ 5:52am 5 hours | Variable | misha7010 | ||
Coalton | Feb 10, 2025 @ 5:51am 5 hours | Ideal | misha7010 | ||
Springbrook South | Feb 9, 2025 @ 9:37pm 13 hours | Unknown | WendyBMA BMA | ||
Springbrook North Rd | Feb 9, 2025 @ 9:37pm 13 hours | Unknown | WendyBMA BMA | ||
Springbrook North | Feb 9, 2025 @ 9:37pm 13 hours | Unknown | WendyBMA BMA | ||
Springbrook Connector | Feb 9, 2025 @ 9:37pm 13 hours | Unknown | WendyBMA BMA | ||
Prairie Vista | Feb 9, 2025 @ 9:37pm 13 hours | Unknown | WendyBMA BMA |
Activity Feed
username | action | type | title | date |
---|---|---|---|---|
misha7010 | add | report | activity #66002092 and 5 more | Feb 10, 2025 @ 5:50am 5 hours |
WendyBMA | add | report | activity #65993121 and 1 more | Feb 9, 2025 @ 9:38pm 13 hours |
WendyBMA | add | report | activity #65993094 and 21 more | Feb 9, 2025 @ 9:37pm 13 hours |
nKwTIMuY | add | report | activity #65979497 and 1 more | Feb 9, 2025 @ 2:06pm 21 hours |
WendyBMA | add | report | activity #65846534 and 1 more | Feb 7, 2025 @ 2:24pm 3 days |
Recent Comments
username | type | title | comment | date |
---|---|---|---|---|
trail | Fun flowy trail that has a way differrent... | Nov 21, 2024 @ 8:46am Nov 21, 2024 | ||
trail | Was a great trail that is now super rutty and... | Nov 21, 2024 @ 8:37am Nov 21, 2024 | ||
trail | Personally I would not ride this trail. It’s... | Oct 26, 2024 @ 1:21pm Oct 26, 2024 | ||
trail | There's a trail split near the top of the... | Sep 2, 2024 @ 4:15pm Sep 2, 2024 | ||
trail | Lee Hill to North Sky Trail is definitely a... | Aug 11, 2024 @ 7:52am Aug 11, 2024 |
Local Badges
-
10 Black Trails598 awarded -
Big Ride 30k26,741 awarded -
Epic Ride 50k10,352 awarded -
Top 10 Trails52 awarded -
Completionist1 awarded -
10 Expert Trails87 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 | ridelogs |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mountain Bike | 189 | 171 miles | 23,806 ft | 75 miles | 3,123 ft | #91 | #42 | 377 | 9,440 | 31 | 107,672 | |
E-Bike | 76 | 97 miles | 4,941 ft | 41 miles | 3,123 ft | #182 | #60 | 5,706 | 1 | 2,951 | ||
Horse | 117 | 96 miles | 13,688 ft | 44 miles | 2,979 ft | #64 | #53 | 1,477 | 17 | 2 | ||
Hike | 334 | 270 miles | 47,106 ft | 118 miles | 3,409 ft | #78 | #42 | 93 | 8,124 | 32 | 13,701 | |
Trail Running | 337 | 270 miles | 47,106 ft | 118 miles | 3,409 ft | #79 | #42 | 1 | 8,124 | 29 | 15,297 | |
Dirtbike/Moto | 2 | 7 miles | 1,260 ft | 5 miles | 791 ft | 1,227 | 1 | 6 | ||||
Observed Trials | 2 | 7 miles | 1,260 ft | 5 miles | 791 ft | 24 | 2 | |||||
ATV/ORV/OHV | 2 | 7 miles | 1,260 ft | 5 miles | 791 ft | 1,227 | 1 | |||||
Snowshoe | 1 | 899 ft | 43 ft | 3 | 17 | 23 |
- By canadaka
Trailforks & contributors
- Admins: WendyBMA, BMA, amrosen, getvert, mpopetz, Pumpntrail, Iowegian
- #4922 - 32,133 views
- boulder activity log | embed map of Boulder mountain bike trails | boulder mountain biking points of interest
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