close
Trail Conditions
- Unknown
- Snow Groomed
- Snow Packed
- Snow Covered
- Freeze/thaw Cycle
- Icy
- Prevalent Mud
- Wet
- Variable
- Ideal
- Dry
- Very Dry
Trail 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%
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
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
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.
No description for Big Rock / Lucas Valley has been added yet!
Login or register to submit one.
Activities Click to view
- Mountain Bike
27 trails
- Hike
27 trails
- Trail Running
27 trails
Region Details
- 11
- 4
- 6
- 5
- 1
Region Status
Caution as of Oct 6, 2021
Stats
- Avg Trail Rating
- Trails (view details)
- 27
- Trails Mountain Bike
- 27
- Trails Hike
- 27
- Trails Trail Running
- 27
- Total Distance
- 42 miles
- Total Descent
- 18,603 ft
- Total Vertical
- 1,759 ft
- Highest Trailhead
- 1,870 ft
- Reports
- 131
- Photos
- 127
- Ridden Counter
- 2,034
Popular Big Rock / Lucas Valley Mountain Biking Trails
Photos of Big Rock / Lucas Valley Mountain Bike
trail: Big Rock Trail
17 |
Jul 21, 2021 @ 8:54pm
Jul 21, 2021
trail: Big Rock Trail
9 |
Jul 21, 2021 @ 8:54pm
Jul 21, 2021
trail: Big Rock Trail
17 |
Jul 21, 2021 @ 8:54pm
Jul 21, 2021
trail: Big Rock Trail
13 |
Jul 10, 2021 @ 4:52pm
Jul 10, 2021
trail: Big Rock Trail
20 |
Jul 10, 2021 @ 4:52pm
Jul 10, 2021
trail: Big Rock Trail
14 |
Jul 10, 2021 @ 4:52pm
Jul 10, 2021
trail: Big Rock Trail
17 |
Jul 10, 2021 @ 4:51pm
Jul 10, 2021
trail: Big Rock Trail
16 |
Jul 10, 2021 @ 4:50pm
Jul 10, 2021Videos of Big Rock / Lucas Valley Mountain Bike
trail: Big Rock Ridge Fire Road
0:09 |
182 |
Sep 27, 2017
trail: Rotor Burn
2:17 |
133 |
Jul 14, 2016
trail: 680
8:41 |
777 |
Jan 21, 2013
trail: Luiz Fire Road
8:42 |
7 |
Aug 27, 2021 , San Rafael
trail: 680
20:33 |
467 |
Jan 1, 2019 , San Rafael
trail: Goat Trail
6:48 |
948 |
Oct 19, 2018 , San Rafael
trail: Idylberry Trail
18:00 |
11 |
Aug 28, 2021 , San Rafael
Recent Trail Reports
| status | trail | date | condition | user | info |
|---|---|---|---|---|---|
| Big Rock Trail | Oct 6, 2021 @ 9:50am Oct 6, 2021 | Very Dry | psheehy | ||
| Burnt Ridge Fire Road | Jul 21, 2021 @ 11:28am Jul 21, 2021 | Unknown | chabos | ||
| Redwood Canyon Fire ROad | Jul 21, 2021 @ 11:17am Jul 21, 2021 | Unknown | chabos | ||
| Goat Trail | Jul 5, 2021 @ 6:20pm Jul 5, 2021 | Very Dry | getinsideways415 | ||
| Luiz Fire Road | Jul 5, 2021 @ 5:47pm Jul 5, 2021 | Very Dry | getinsideways415 | ||
| Queenstone Fire Road | Jun 30, 2021 @ 12:04pm Jun 30, 2021 | Dry | Pete-Mi | ||
| Loma Alta Fire Rd. | May 8, 2021 @ 8:41am May 8, 2021 | Very Dry | chriscrisp | ||
| Luiz Ranch Fire road | Apr 24, 2021 @ 8:36am Apr 24, 2021 | Dry | Bro-tato | ||
| Big Rock Ridge Fire Road | Apr 24, 2021 @ 8:36am Apr 24, 2021 | Very Dry | Bro-tato | ||
| 680 | Apr 3, 2021 @ 7:43am Apr 3, 2021 | Dry | Nibot33 |
Activity Feed
| username | action | type | title | date | |
|---|---|---|---|---|---|
 | shshoup | add | karma | Big Rock / Lucas Valley | Oct 14, 2021 @ 7:25pm Oct 14, 2021 |
| psheehy | add | report | Big Rock Trail | Oct 6, 2021 @ 1:07pm Oct 6, 2021 |
| misterjohn123 | wishlist | trail | Goat Trail | Sep 29, 2021 @ 9:37am Sep 29, 2021 |
| windwagon | wishlist | trail | Goat Trail | Sep 25, 2021 @ 5:13pm Sep 25, 2021 |
 | jakespeakman88 | difficultyvote | trail | Goat Trail | Sep 20, 2021 @ 8:47pm Sep 20, 2021 |
Recent Comments
| username | type | title | comment | date | |
|---|---|---|---|---|---|
| trail | Pretty fun trail, can really get some serious... | Sep 29, 2021 @ 12:18pm Sep 29, 2021 | ||
| trail | Pretty fun trail, can really get some serious... | Sep 29, 2021 @ 12:18pm Sep 29, 2021 | ||
 | trail | Its true. even go down feel the steep. | Aug 27, 2021 @ 11:18pm Aug 27, 2021 | ||
 | trail | Description says it all. I wouldn’t say this... | Jul 10, 2021 @ 4:48pm Jul 10, 2021 | ||
| trail | Do not come up Luis Fire Road to hit this... | Jul 5, 2021 @ 6:17pm Jul 5, 2021 |
Nearby Areas
| name | distance | ||||
|---|---|---|---|---|---|
| Big Rock / Novato | 1 | 2.5 km | |||
| Tamarancho / West Marin / North Tam | 12 | 37 | 29 | 1 | 3.1 km |
| Gold Hill | 4.9 km | ||||
| garin | 5.2 km | ||||
| China Camp | 4 | 14 | 9 | 5.9 km |
Local Products
Activity Type Stats
| activitytype | trails | distance | descent | descent distance | total vertical | rating | global rank | state rank | photos | reports | routes | ridelogs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mountain Bike | 27 | 42 miles | 18,602 ft | 26 miles | 1,759 ft | #5,648 | #2,434 | 127 | 131 | 4,532 | ||
| Hike | 27 | 42 miles | 18,602 ft | 26 miles | 1,759 ft | #4,856 | #2,286 | 131 | 269 | |||
| Trail Running | 27 | 42 miles | 18,602 ft | 26 miles | 1,759 ft | #4,860 | #2,284 | 131 | 32 |
- By brenthillier
NSMBA TRAILFORKS & contributors - Admins: A4B, MCBC
- #3979 - 6,680 views
- big rock / lucas valley activity log | embed map of Big Rock / Lucas Valley mountain bike trails | big rock / lucas valley mountain biking points of interest
- subscribe 3d map donate to earn trail karma!
Downloading of trail gps tracks in kml & gpx formats is enabled for Big Rock / Lucas Valley.
You must login to download files.