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Trail Conditions
- Unknown
- Snow Groomed
- Snow Packed
- Snow Covered
- Snow Cover Partial
- Freeze/thaw Cycle
- Icy
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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
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- 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
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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
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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 riders 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.
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Links
Activities Click to view
- Mountain Bike
41 trails
- E-Bike
7 trails
- Gravel Bike
1 trails
- Adaptive Bike
0 trails
- Horse
41 trails
- Hike
85 trails
- Trail Running
86 trails
Region Details
- 15
- 1
- 10
- 10
- 1
Region Status
Open as of May 28, 2026
Stats
- Avg Trail Rating
- Global Ranking
- #2,675
- State Ranking
- #956
- Trails (view details)
- 75
- Trails Mountain Bike
- 41
- Trails E-Bike
- 7
- Trails Gravel Bike
- 1
- Trails Horse
- 41
- Trails Hike
- 86
- Trails Trail Running
- 86
- Total Distance
- 73 miles
- Total Descent
- 16,823 ft
- Total Vertical
- 2,034 ft
- Highest Trailhead
- 2,038 ft
- Reports
- 594
- Photos
- 95
- Ridden Counter
- 27,982
Sub Regions
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Alto Bowl Preserve
- 1
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Camino Alto Preserve
- 7
- 2
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Horse Hill Preserve
- 1
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Mount Tamalpais State Park
- 6
- 7
- 1
Popular Mill Valley Mountain Biking Trails
• 95 ★ 3.7 • 3 miles • 209 ft • 1,470 •
Easy and fun wide single-track with some nice switchbacks going from HWY 1 down to Muir Beach. Nice trail to finish a ride with and end up at the Pelican Pub. Watch out for hikers/trail runners. Still inside the edge of the GGNRA so...
• 80 ★ 3.7 • 3 miles • 9 ft • 1,158 •
Great views, but very popular trail, especially on weekends. Watch out for lots of hikers.
• 80 ★ 4.2 • 1 mile • 7 ft • 522 •
A Singletrack turning into a doubletrack that heads from Mountain Home Inn to downtown Mill Valley. Lots of hikers use it and expect to see a few bikers as well. Erosion is a large issue due to the lack of permits being issued for trail...
• 100 ★ 4.0 • 584 ft • 0 ft • 488 •
Popular blue difficulty singletrack. This multi-use trail can be used both directions.
• 85 ★ 4.0 • 984 ft • 33 ft • 264 •
Popular green difficulty singletrack. This multi-use trail can be used both directions and has a easy overall physical rating with a 33 ft green climb. Trail visibility is always easy to follow. On average it takes 1 minutes to complete this trail.
• 75 ★ 2.8 • 2,612 ft • 11 ft • 190 •
Used to be singletrack now it is doubletrack it is like a fire road dusty and dry. Ride when wet, tacky, and grippy. Hikers and horses use the trail, too, so don't go too fast...
• 70 ★ 3.5 • 2,402 ft • 3 ft • 183 •
Popular green difficulty singletrack. This multi-use trail can be used downhill primary and has a easy overall physical rating with a 3 ft blue climb. Trail visibility is always easy to follow. On average it takes 2 minutes to complete this trail.
Mill Valley Mountain Bike Routes
★ 3.5 • 26 miles • 3,747 ft • 7 • Loop •
This is a great route to tour you through some of the best mountain biking in the Mt Tam area. It starts...
★ 5.0 • 26 miles • 4,655 ft • 12 • Loop •
Extended version of Mt Tam Rounder route .. Loop begins and ends at Old Railroad Grade (West Blithedale...
★ 5.0 • 21 miles • 4,082 ft • 5 •
Round the mountain loop that starts and ends on West Blithedale Ave. Trail types mostly fire roads and Mt...
★ 5.0 • 23 miles • 4,290 ft • 6 •
Loop route that starts and ends anywhere of West Blithedale Ave (WBA). Moderate to steep ascents and...
★ 5.0 • 19 miles • 3,329 ft • 7 • Loop •
Classic loop on the southern side and foothills of Mt Tamalpais. Cardiac ascents, white knuckle descents,...
★ 5.0 • 16 miles • 2,487 ft • 5 • Loop •
Quick loop up and around Tam
Photos of Mill Valley Mountain Bike
Videos of Mill Valley Mountain Bike
trail: Octopus Trail
0:00 |
159 |
Oct 15, 2020
trail: Tenderfoot
0:06 |
276 |
Aug 9, 2017
trail: Tenderfoot
4:36 |
1003 |
Jul 13, 2015
trail: Willow Camp Fire Road
12:36 |
261 |
Jun 17, 2023 , Mill Valley
trail: Coast View Trail
10:15 |
949 |
Feb 8, 2022 , Mill Valley
trail: Coast View Trail
5:33 |
701 |
Jun 20, 2021 , Mill Valley
Recent Trail Reports
Activity Feed
| username | action | type | title | date |
|---|---|---|---|---|
| DonaldlYCnhZ | wishlist | route | activity #98736222 | Jul 8, 2026 @ 1:37pm 18 hours |
| Chris0KsaYq | wishlist | route | activity #98690955 | Jul 7, 2026 @ 9:55pm 1 day |
| philmar81 | wishlist | route | activity #98670484 | Jul 7, 2026 @ 3:31pm 2 days |
| mattagiii | wishlist | trail | activity #98470206 | Jul 4, 2026 @ 8:23pm Jul 4, 2026 |
| tamalot | ridden | trail | activity #98442432 | Jul 4, 2026 @ 12:07pm Jul 4, 2026 |
Recent Comments
| username | type | title | comment | date |
|---|---|---|---|---|
| trail | I feel bad for my comments about the ruts,... | Jun 24, 2026 @ 8:46am Jun 24, 2026 | ||
| trail | Definitely has been plowed and is now a green... | Jun 15, 2026 @ 6:30pm Jun 15, 2026 | ||
| trail | well it's a green trail now I just rode it... | May 21, 2026 @ 4:35pm May 21, 2026 | ||
| trail | Bro I totally AGREE with everything you're... | May 21, 2026 @ 4:31pm May 21, 2026 | ||
| trail | I hurd that what's up with Marin? And isn't a... | May 21, 2026 @ 4:25pm May 21, 2026 |
Local Badges
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10 Blue Trails227 awarded -
Epic Ride Climb 2k1,119 awarded -
Climbing 10k Badge423 awarded -
Climbing 100k Badge37 awarded -
Epic Ride Descent 2k1,124 awarded -
Descent 10k Badge426 awarded
Local Mountain Biking Directory
-
Tam BikesBike Shop
Activity Type Stats
| activitytype | trails | distance | descent | descent distance | total vertical | rating | global rank | state rank | photos | reports | routes | ridelogs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mountain Bike | 41 | 27 miles | 7,126 ft | 16 miles | 1,926 ft | #2,675 | #956 | 103 | 592 | 16 | 38,208 | |
| E-Bike | 7 | 3 miles | 85 ft | 3,087 ft | 469 ft | #7,282 | #2,192 | 518 | 5 | 2,248 | ||
| Gravel Bike | 1 | #90 | #781 | 2 | 1 | 125 | ||||||
| Horse | 41 | 38 miles | 8,307 ft | 21 miles | 2,034 ft | #1,241 | #771 | 68 | ||||
| Hike | 85 | 73 miles | 16,824 ft | 38 miles | 2,034 ft | #916 | #418 | 2 | 593 | 59 | 5,457 | |
| Trail Running | 86 | 73 miles | 16,824 ft | 38 miles | 2,034 ft | #2,270 | #704 | 593 | 56 | 3,077 |
Frequently Asked Questions About Mill Valley
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What are the best places to ride in Mill Valley?
Mill Valley has 6 areas to explore for mountain biking. The top rated areas are:
▼
What are the highest rated mountain biking trails in Mill Valley?
The highest rated mountain biking trails in Mill Valley are:
- Tenderfoot (4.1/5)
- Octopus Trail (4/5)
- Monte Vista Trail (3.8/5)
- Val Vista Trail (3.8/5)
- Dias Ridge Trail (3.8/5)
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What is the best time of the year to ride in Mill Valley?
Based on ride log data, the most popular months to ride in Mill Valley are:
- July (113 activities)
- September (107 activities)
- October (102 activities)
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Where can I park to ride in Mill Valley?
There are 9 parking locations listed in Mill Valley. The most popular parking spots are: View all parking and trailhead locations on the map to plan your visit.
Activities
Trails
- By canadaka
Trailforks & contributors - Admins: A4B
- #10847 - 15,998 views
- mill valley activity log | embed map of Mill Valley mountain bike trails | mill valley mountain biking points of interest polygons
Downloading of trail gps tracks in kml & gpx formats is enabled for Mill Valley.
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