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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
inches
US Cell Coverage
Legend
Radar Time
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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
Warning
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.
Save the current map location and zoom level as your default home location whenever this page is loaded.
SaveAn expansive south-facing slope rising above a historic Marin valley.
Primary Trail Type: Cross-Country
Land Status: County Park
Land Manager: Marin County Parks
Links
Activities Click to view
- Mountain Bike
22 trails
- Horse
14 trails
- Hike
30 trails
- Trail Running
30 trails
Region Details
- 3
- 9
- 7
- 3
Region Status
Caution as of Jul 9, 2025
Stats
- Avg Trail Rating
- Trails (view details)
- 26
- Trails Mountain Bike
- 22
- Trails Horse
- 14
- Trails Hike
- 30
- Trails Trail Running
- 30
- Total Distance
- 37 miles
- Total Descent
- 15,115 ft
- Total Vertical
- 1,748 ft
- Highest Trailhead
- 1,860 ft
- Reports
- 263
- Photos
- 152
- Ridden Counter
- 632
Popular Lucas, Ignacio, Loma Verde, Pacheco and Marinwood Open Space Trails
Mountain Bike Routes
| title | rating | distance |
|---|---|---|
| LIJAH LOOP 26 | 25 miles | |
| 18 mile Big Rock / Lucas Valley Ride | popular ridelog | 18 miles |
| 15 mile Big Rock / Lucas Valley Ride | popular ridelog | 15 miles |
| 8 mile Big Rock / Lucas Valley Ride | popular ridelog | 8 miles |
| 7 mile Big Rock / Lucas Valley Ride | popular ridelog | 7 miles |
| 9 mile Big Rock / Lucas Valley All-Mountain Ride | popular ridelog | 9 miles |
| 8 mile Big Rock / Lucas Valley Ride | popular ridelog | 8 miles |
| 9 mile Big Rock / Lucas Valley Ride | popular ridelog | 9 miles |
| 20 mile Big Rock / Lucas Valley Ride | popular ridelog | 20 miles |
Photos of Lucas, Ignacio, Loma Verde, Pacheco and Marinwood Open Space Mountain Bike
trail: Big Rock Trail
34 |
Apr 11, 2023 @ 7:11pm
Apr 11, 2023
trail: Big Rock Ridge Fire Road
29 |
Apr 11, 2023 @ 7:10pm
Apr 11, 2023
trail: Luiz Fire Road
19 |
Apr 11, 2023 @ 7:07pm
Apr 11, 2023
trail: Luiz Fire Road
20 |
Apr 11, 2023 @ 7:07pm
Apr 11, 2023
trail: Big Rock Ridge Fire Road
22 |
Mar 7, 2023 @ 7:49pm
Mar 7, 2023
trail: Big Rock Ridge Fire Road
33 |
Mar 7, 2023 @ 7:49pm
Mar 7, 2023
trail: Luiz Fire Road
27 |
Mar 4, 2023 @ 6:26pm
Mar 4, 2023
trail: Big Rock Ridge Fire Road
82 | | 1 comments
Mar 13, 2019 @ 11:21pm
Mar 13, 2019Videos of Lucas, Ignacio, Loma Verde, Pacheco and Marinwood Open Space Mountain Bike
trail: Big Rock Ridge Fire Road
0:09 |
233 |
Sep 27, 2017
trail: Idylqueen
2:17 |
133 |
Jul 14, 2016
trail: Halloween
2:53 |
397 |
Nov 1, 2014
trail: Ponti Ridge Trail
12:08 |
375 |
Jun 22, 2022 , Lucas Valley - Marinwood
youtuber
![I WILL PAY THE PRICE TODAY | Mountain Biking...]()
trail: Ponti Ridge Trail
21:29 |
771 |
Feb 7, 2022 , Lucas Valley - Marinwood
trail: Big Rock Trail
7:15 |
275 |
Feb 8, 2022 , Lucas Valley - Marinwood
trail: Halloween
2:04 |
676 |
Nov 23, 2009
trail: Halloween
2:10 |
456 |
Nov 1, 2009
Recent Trail Reports
| status | trail | date | condition | info | user |
|---|---|---|---|---|---|
| Little Cat Fire Road | Jul 9, 2025 @ 4:28pm Jul 9, 2025 | Very Dry | awaite | ||
| Ponti Ridge Trail | Jun 26, 2025 @ 10:35am Jun 26, 2025 | Dry | dmandave | ||
| Chicken Shack Fire Road | Jun 14, 2025 @ 3:01pm Jun 14, 2025 | Dry | dfsnow | ||
| Queenstone Fire Road | Jan 18, 2025 @ 2:13pm Jan 18, 2025 | Variable | awaite | ||
| Luiz Fire Road | Jul 21, 2024 @ 4:22pm Jul 21, 2024 | Very Dry | Tigrtheshredder | ||
| Big Rock Trail | Jul 16, 2024 @ 12:49am Jul 16, 2024 | Very Dry | tamarancho-report EMBA | ||
| Redwood Canyon Fire ROad | May 5, 2024 @ 7:33am May 5, 2024 | Variable | tamalot | ||
| Luiz Gate Road | Apr 19, 2024 @ 9:15am Apr 19, 2024 | Ideal | Ketwonbet | ||
| Idylberry Trail | Dec 12, 2023 @ 2:57pm Dec 12, 2023 | Variable | awaite | ||
| Big Rock Ridge Fire Road | Mar 24, 2023 @ 8:14pm Mar 24, 2023 | Dry | Swede1246 |
Activity Feed
| username | action | type | title | date |
|---|---|---|---|---|
| John86sUmC | comment | trail | activity #76170065 | Jul 18, 2025 @ 11:09am 21 hours |
| Deadman101202 | wishlist | trail | activity #75193902 | Jul 4, 2025 @ 2:35pm Jul 4, 2025 |
| awaite | add | report | activity #75087960 | Jul 3, 2025 @ 6:59am Jul 3, 2025 |
| curranslee10 | wishlist | trail | activity #74702524 and 1 more | Jun 27, 2025 @ 8:33pm Jun 27, 2025 |
| dmandave | add | report | activity #74621032 | Jun 26, 2025 @ 1:51pm Jun 26, 2025 |
Recent Comments
| username | type | title | comment | date |
|---|---|---|---|---|
| trail | 100% - avoid this one and use the Queenstone... | Jul 18, 2025 @ 11:09am 21 hours | ||
| trail | This road sucks, especially in the summer.... | Jun 14, 2025 @ 3:06pm Jun 14, 2025 | ||
| trail | I love this trail, it is so nice and flowing.... | Apr 7, 2025 @ 9:44pm Apr 7, 2025 | ||
| trail | I got back off this trail as soon as I could.... | Apr 7, 2025 @ 9:42pm Apr 7, 2025 | ||
| trail | This might be the only fire road I’ve given... | Apr 7, 2025 @ 9:40pm Apr 7, 2025 |
Nearby Areas
| name | distance | ||||
|---|---|---|---|---|---|
| San Domenico | 1 | 2 | 1 | 2.2 km | |
| The Graveyard | 2 | 2.2 km | |||
| Terra Linda / Sleepy Hollow Preserve | 5 | 2.6 km | |||
| Loma Alta Preserve | 3 | 1 | 3 km | ||
| Hamilton Field | 2 | 3.6 km |
Activity Type Stats
| activitytype | trails | distance | descent | descent distance | total vertical | rating | global rank | state rank | photos | reports | routes | ridelogs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mountain Bike | 22 | 34 miles | 12,579 ft | 21 miles | 1,749 ft | #3,380 | #1,698 | 155 | 260 | 1 | 10,432 | |
| Horse | 14 | 22 miles | 6,198 ft | 12 miles | 1,709 ft | #170 | #142 | 38 | 1 | |||
| Hike | 30 | 37 miles | 15,115 ft | 24 miles | 1,749 ft | #2,655 | #1,526 | 263 | 620 | |||
| Trail Running | 30 | 37 miles | 15,115 ft | 24 miles | 1,749 ft | #2,662 | #1,523 | 4 | 263 | 391 |
- By Jratcliffe57
A4B & contributors - Admins: A4B, A4B
- #68311 - 594 views
- lucas, ignacio, loma verde, pacheco and marinwood open space activity log | embed map of Lucas, Ignacio, Loma Verde, Pacheco and Marinwood Open Space mountain bike trails | lucas, ignacio, loma verde, pacheco and marinwood open space mountain biking points of interest polygons
Downloading of trail gps tracks in kml & gpx formats is enabled for Lucas, Ignacio, Loma Verde, Pacheco and Marinwood Open Space.
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