Open in App
Get this trail on your phone instantly.
more stats
4,548 ft
Distance
259 ft
Climb
-380 ft
Descent
00:07:32
Avg time
-121 ft
Altitude change
815 ft
Altitude min
987 ft
Altitude max
987 ft
Altitude start
865 ft
Altitude end
-59.983%
Grade max
39.695%
Grade min
1,654 ft
Distance climb
2,701 ft
Distance down
194 ft
Distance flat
00:07:32
Avg time
B-17 Trail Details
-
Activities
- Mountain Bike
- E-Bike
- Hike
- Trail Running
-
Riding AreaTamarancho
Fairfax, California -
Difficulty Rating
-
Voted DifficultyBlue (4 votes)
-
Local Popularity85 in Mountain Biking [+]
- 35 in E-Biking
- 20 in Trail Running
- 40 in Hiking
-
Global Ranking
-
State Ranking#952 in Mountain Biking · California [+]
- #1,353 in E-Biking
- #8,344 in Trail Running
- #9,003 in Hiking
-
Trail TypeSingletrack
-
Bike TypeXC
-
DirectionBoth DirectionsPopular Direction Shown
-
Climb DifficultyBlue
-
Physical RatingModerate
-
Dogs AllowedYes
-
eBike Allowed
-
Land OwnerBoy Scouts of America
A Fun fast flowy trail that is made from classic redwood dirt. Trail named after the b17 crash on whites hill during the cold war.
Local Trail Association
-
-
-
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
- 0 rides
6 Months
- 81 rides
- 15 miles avg distance
All
- 2,203 rides
- Last: Oct 7, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
B-17 Trail Trail Reports
more »
close
3D
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 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.
?
Activity Recordings
Trailforks uses anonymized public activity data.
?
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.
Save
Directions to b17-trail trailhead
(37.991020, -122.622450)
Photos
6 more »
Trail Lists
Routes with this trail
★ 5.0 • 14 miles • 2,406 ft • 7 •
Tamarancho Ride from Fairfax. Maiden Voyage
★ 3.5 • 7 miles • 1,254 ft • 10 • Loop •
Great loop around Tamarancho Trail system!
★ 3.5 • 19 miles • 2,965 ft • 11 • Loop •
Begin the Tamarancho loop via Alchemists Trail then take Dead Heifer Fire Road at the bottom of the Endor...
Trail Products
scubasteve123412
B-17 is my favorite section of the Tamarancho Loop after Endor. Its nice and smooth for the most part thanks to the soft pine needles and nice and flowy.
fastkitty
Not much in the way of climbing but some roots to clear on the way up and some narrow switch backs - at some parts trail is narrow with some exposure. Also, some areas have trees tight on both sides of the trail that you need to be mindful of while also clearing the roots. Note - this is my general comment for Tamarancho - it is one of the only single track trail system that makes me wish I did not have broad shoulders.
We hope you've been enjoying Trailforks!
Create a FREE account to view all trail reviews and much more.
Nearby Trails
- Blue Ridge Fire Road 0 ft
- Saddlecut Trail 266 ft
- Wagon Wheel Trail 2,674 ft
- Broken Dam Trail 2,822 ft
- Burnt Tree Fire Road 2,822 ft
- By TheBikeNerd
NWTA & contributors - #20431 - 9,281 views
- Follow/Subscribe
- login to download gpx or kml files.
Hit the Trail
Download Trail
Save to wishlist, Garmin & download.
Find Related Routes
Find routes and users activities that include this trail.
You must enter a description before submitting.