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Trail Conditions
- Unknown
- Snow Groomed
- Snow Packed
- Snow Covered
- Snow Cover Inadequate
- 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
inches
Radar Time
x
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
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
3 trails
Region Details
- 2
- 1
Region Status
Open as of Feb 18, 2023Stats
- Avg Trail Rating
- State Ranking
- #5,563
- Trails (view details)
- 7
- Trails Mountain Bike
- 3
- Trails Horse
- 3
- Trails Hike
- 7
- Trails Trail Running
- 7
- Total Distance
- 9 miles
- Total Descent Distance
- 4 miles
- Total Descent
- 2,099 ft
- Total Vertical
- 1,375 ft
- Highest Trailhead
- 2,044 ft
- Reports
- 6
- Ridden Counter
- 280
Sub Regions
-
Coal Creek Open Space Preserve
- 1
-
Windy Hill Open Space Preserve
Popular Portola Valley Mountain Biking Trails
| status | title | difficulty | rating |
|---|---|---|---|
| Audobon Frontage | |||
| Portola Drop |
Portola Valley Mountain Bike Routes
| title | rating | distance |
|---|---|---|
| Really Light Enduro race track | 19 miles |
Recent Trail Reports
| status | trail | date | condition | info | user |
|---|---|---|---|---|---|
| Washing Machine | Feb 18, 2023 @ 9:52pm Feb 18, 2023 | Ideal | Coezycoe | ||
| Audobon Frontage | Dec 12, 2021 @ 10:44am Dec 12, 2021 | Unknown | hendrik42 |
Activity Feed
| username | action | type | title | date | |
|---|---|---|---|---|---|
 | tortis302 | wishlist | skillpark | Ladera Dirt Jump Park | Dec 10, 2022 @ 7:50pm Dec 10, 2022 |
| timanglade | wishlist | skillpark | Ladera Dirt Jump Park | Nov 25, 2022 @ 9:02pm Nov 25, 2022 |
| Patch12 | wishlist | route | Really Light Enduro race track | Nov 25, 2022 @ 11:05am Nov 25, 2022 |
| hanyrn | wishlist | route | Really Light Enduro race track | Oct 8, 2022 @ 2:08pm Oct 8, 2022 |
| uartglenn | add | region | Windy Hill Open Space Preserve | Aug 26, 2022 @ 9:04am Aug 26, 2022 |
Recent Comments
| username | type | title | comment | date | |
|---|---|---|---|---|---|
 | trail | Gone Forever | Jun 8, 2022 @ 4:23pm Jun 8, 2022 | ||
| trail | Did I mention this is the best part of Alpine? | Oct 3, 2021 @ 11:55am Oct 3, 2021 | ||
| trail | Best part of Alpine. Don't skip it. | Oct 3, 2021 @ 11:55am Oct 3, 2021 | ||
| trail | Best part of Alpine. Don't skip it. | Oct 3, 2021 @ 11:54am Oct 3, 2021 | ||
 | skillpark | Super fun spot to ride, The kids there are... | Sep 21, 2020 @ 11:13am Sep 21, 2020 |
Bike & Skill Parks
| name | type | city | rating |
|---|---|---|---|
| Ladera Dirt Jump Park | skill park | Portola Valley |
Activity Type Stats
| activitytype | trails | distance | descent | descent distance | total vertical | rating | global rank | state rank | photos | reports | routes | ridelogs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mountain Bike | 3 | 2 miles | 456 ft | 4,954 ft | 807 ft | #5,563 | 6 | 1 | 741 | |||
| Horse | 3 | 4 miles | 472 ft | 1 mile | 1,165 ft | |||||||
| Hike | 7 | 9 miles | 2,100 ft | 4 miles | 1,375 ft | 6 | 174 | |||||
| Trail Running | 7 | 9 miles | 2,100 ft | 4 miles | 1,375 ft | 6 | 21 |
- By Deandonat1004
& contributors - Admins: spokesmanmtb, CMB
- #40579 - 498 views
- portola valley activity log | embed map of Portola Valley mountain bike trails | polygons
Downloading of trail gps tracks in kml & gpx formats is enabled for Portola Valley.
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