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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.
  • > 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
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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
Winter Trails
Warning A routing network for winter maps does not exist. Selecting trails using the winter trails layer has been disabled.
x 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.
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      No description for Lucas Valley - Marinwood has been added yet! Login or register to submit one.
      Links
      Activities Click to view
      Region Details
      • 5
      • 11
      • 9
      • 4

      Region Status
      Caution as of May 1, 2025

      Stats

      Avg Trail Rating
      Trails (view details)
      35
      Trails Mountain Bike
      29
      Trails E-Bike
      1
      Trails Horse
      24
      Trails Hike
      41
      Trails Trail Running
      41
      Total Distance
      42 miles
      Total Descent
      17,841 ft
      Total Vertical
      1,781 ft
      Highest Trailhead
      1,860 ft
      Reports
      264
      Photos
      152
      Ridden Counter
      2,963
      Sub Regions

      Photos of Lucas Valley - Marinwood Mountain Bike

      32 |
      Apr 11, 2023 @ 7:11pm
      Apr 11, 2023
      28 |
      Apr 11, 2023 @ 7:10pm
      Apr 11, 2023
      17 |
      Apr 11, 2023 @ 7:07pm
      Apr 11, 2023
      18 |
      Apr 11, 2023 @ 7:07pm
      Apr 11, 2023
      21 |
      Mar 7, 2023 @ 7:49pm
      Mar 7, 2023
      33 |
      Mar 7, 2023 @ 7:49pm
      Mar 7, 2023
      25 |
      Mar 4, 2023 @ 6:26pm
      Mar 4, 2023
      82 |
      Mar 13, 2019 @ 11:21pm
      Mar 13, 2019
      | 1 comments

      Videos of Lucas Valley - Marinwood Mountain Bike

      Big Rock
      0:09 | 228 | Sep 27, 2017
      BRAKE FADE!!!!!!!!!!!!
      trail: Idylqueen
      2:17 | 133 | Jul 14, 2016
      Halloween shenanigans
      trail: Halloween
      2:53 | 397 | Nov 1, 2014
      Ponti Ridge | Novato California
      12:08 | 349 | Jun 22, 2022 , Lucas Valley - Marinwood
      youtuber I WILL PAY THE PRICE TODAY | Mountain Biking...
      21:29 | 728 | Feb 7, 2022 , Lucas Valley - Marinwood
      Big Rock Trail / Marin County Flow &...
      7:15 | 272 | Feb 8, 2022 , Lucas Valley - Marinwood
      Rehab Solo Ride to Recovery
      trail: Halloween
      2:04 | 676 | Nov 23, 2009
      Halloween Shuttle Ride
      trail: Halloween
      2:10 | 456 | Nov 1, 2009

      Recent Trail Reports

      statustraildateconditioninfouser
      Ponti Ridge Trail
      May 1, 2025 @ 9:31am
      May 1, 2025
      		 DryE-Bike jhart94949
      Little Cat Fire Road
      Feb 9, 2025 @ 8:46am
      Feb 9, 2025
      		 WetSoft in a couple spots.awaite
      Chicken Shack Fire Road
      Jan 19, 2025 @ 2:12pm
      Jan 19, 2025
      		 IdealA few wet spots but mostly good dirtLarryeskabob
      Queenstone Fire Road
      Jan 18, 2025 @ 2:13pm
      Jan 18, 2025
      		 VariableMostly dry but still tacky in a couple of...awaite
      Luiz Fire Road
      Jul 21, 2024 @ 4:22pm
      Jul 21, 2024
      		 Very DryTigrtheshredder
      Big Rock Trail
      Jul 16, 2024 @ 12:49am
      Jul 16, 2024
      		 Very Dry tamarancho-report A4B
      Redwood Canyon Fire ROad
      May 5, 2024 @ 7:33am
      May 5, 2024
      		 VariableClosed west of Big Rock Trail, open to...tamalot
      Luiz Gate Road
      Apr 19, 2024 @ 9:15am
      Apr 19, 2024
      		 IdealKetwonbet
      Idylberry Trail
      Dec 12, 2023 @ 2:57pm
      Dec 12, 2023
      		 VariableI spotted one sing that indicated...awaite
      Big Rock Ridge Fire Road
      Mar 24, 2023 @ 8:14pm
      Mar 24, 2023
      		 DrySwede1246

      Activity Feed

      usernameactiontypetitledate
      ElliottF73nYhwishlisttrailactivity #71299381
      May 9, 2025 @ 9:36am
      May 9, 2025
      GostRiotaddrouteactivity #71185776
      May 7, 2025 @ 1:21pm
      May 7, 2025
      updateeventactivity #71182127
      May 7, 2025 @ 12:14pm
      May 7, 2025
      QuinnrNXvcdwishlisttrailactivity #71025467 and 1 more
      May 4, 2025 @ 4:58pm
      May 4, 2025
      jhart94949addreportactivity #70772092 and 1 more
      May 1, 2025 @ 11:05am
      May 1, 2025

      Recent Comments

      usernametypetitlecommentdate
      scubasteve123412trailPonti Ridge TrailI love this trail, it is so nice and flowing....
      Apr 7, 2025 @ 9:44pm
      Apr 7, 2025
      scubasteve123412trailIdylberry TrailI got back off this trail as soon as I could....
      Apr 7, 2025 @ 9:42pm
      Apr 7, 2025
      scubasteve123412trailLuiz Fire RoadThis might be the only fire road I’ve given...
      Apr 7, 2025 @ 9:40pm
      Apr 7, 2025
      scubasteve123412trailBig Rock TrailThis could be my favorite downhill in the Bay...
      Apr 7, 2025 @ 9:39pm
      Apr 7, 2025
      scubasteve123412trailChicken Shack Fire RoadOne of the steepest fire roads around. It...
      Apr 7, 2025 @ 9:36pm
      Apr 7, 2025

      Local Badges

      Upcoming Local Events


      Activity Type Stats

      activitytypetrailsdistancedescentdescent distancetotal verticalratingglobal rankstate rankphotosreportsroutesridelogs
      Mountain Bike2937 miles14,121 ft23 miles1,749 ft
      		#2,438#1,194155262513,705
      E-Bike12,933 ft66 ft390 ft
      		#2,71020231,760
      Horse2426 miles7,635 ft15 miles1,742 ft
      		#114#92382
      Hike4142 miles17,841 ft27 miles1,781 ft
      		#1,922#1,0732641894
      Trail Running4142 miles17,841 ft27 miles1,781 ft
      		#1,936#1,07742641418
      • By maddy03TF Pro & contributors
      • Admins: A4B
      • #55582 - 833 views
      • lucas valley - marinwood activity log | embed map of Lucas Valley - Marinwood mountain bike trails | lucas valley - marinwood mountain biking points of interest polygons

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