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Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • 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.
  • > 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
ContributeDetails
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

LEGEND
Trail Difficulties
  • Access Road/Trail
  • White
  • Green
  • Blue
  • Black
  • Double Black Diamond

Trail Report Status
  • Clear / Green
  • Minor Issue / Yellow
  • Significant Issue / Amber
  • Closed

  • Land Owner Overlay
  • Wilderness (typically no bikes in USA)
  • BLM (public)
  • USFS (Wildlife sanctuaries darker than usfs)
  • State land
  • Indigenous
  • Military
Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Dry
  • Very Dry
  • Map Markers
  • trail Trail Head
  • photo Photo
  • place Directory Listing
  • region Riding Area
  • TTF TTF
  • Parking Parking
  • Viewpoint Viewpoint
  • Information Information
  • Warning Warning
  • Directions Directions
  • Sight Sight
  • Restrooms Restrooms
  • eBike Charging Point eBike Charging Point
  • Water Fountain/Source Water Fountain/Source
  • Gate Gate
  • Trail Sign Trail Sign
  • Table or Bench Table or Bench
  • Ladder Ladder
  • Stairs Stairs
  • Bridge Bridge
  • Camping Camping
  • Cabin Cabin
  • Lodge Lodge
  • Bear Cache Bear Cache
  • Dock Dock
  • Ranger Station Ranger Station
  • Summit Summit
  • Other Other
      No description for Big Rock / Lucas Valley has been added yet! Login or register to submit one.
      Region Details
      • 7
      • 4
      • 7
      • 5
      • 1

      Region Status
      Open as of Oct 9, 2019 ago

      Stats

      Avg Trail Rating
      Global Ranking
      #4,189
      State Ranking
      #193
      Trails (view details)
      24
      Trails Mountain Bike
      25
      Trails Hike
      25
      Trails Trail Running
      25
      Total Distance
      38 miles
      Total Descent
      17,578 ft
      Total Vertical
      1,763 ft
      Highest Trailhead
      1,868 ft
      Reports
      63
      Photos
      107
      Ridden Counter
      597

      Photos of Big Rock / Lucas Valley Mountain Bike

      19 |
      May 15, 2019 @ 8:58am
      May 15, 2019
      11 |
      May 15, 2019 @ 8:58am
      May 15, 2019
      13 |
      May 15, 2019 @ 8:58am
      May 15, 2019
      9 |
      Mar 13, 2019 @ 11:25pm
      Mar 13, 2019

      Videos of Big Rock / Lucas Valley Mountain Bike

      Big Rock
      0:09 | 97 | Sep 27, 2017
      BRAKE FADE!!!!!!!!!!!!
      trail: Rotor Burn
      2:17 | 133 | Jul 14, 2016
      680 to Solstice
      trail: 680
      8:41 | 620 | Jan 21, 2013
      680 Trail - Top Down
      trail: 680
      20:33 | 79 | Jan 1, 2019 , San Rafael

      Recent Trail Reports

      Activity Feed

      usernameactiontypetitledate
      user #1716334CaliGoldRushriddentrailGoat Trail
      Oct 15, 2019 @ 11:16am
      2 days
      user #1288165brianpetryupdatetrailSkywalker Singletrack
      Oct 15, 2019 @ 9:36am
      2 days
      user #794672acyclistaddreport680 and 3 more
      Oct 9, 2019 @ 7:28pm
      Oct 9, 2019
      user #794672acyclistriddentrail680 and 4 more
      Oct 9, 2019 @ 7:27pm
      Oct 9, 2019
      user #794672acyclistvotetrail680 and 4 more
      Oct 9, 2019 @ 7:27pm
      Oct 9, 2019

      Recent Comments

      usernametypetitlecommentdate
      user #1116869awaitetrailIdylberry TrailThis trail is managed by the Marinwood...
      Sep 6, 2019 @ 5:14pm
      Sep 6, 2019
      user #779222dhackingtrailQueenstone TrailCan't pedal up it because it's to steep and...
      Aug 2, 2018 @ 9:24pm
      Aug 2, 2018
      user #1501000Dk563trailLuiz Fire RoadBrutally and relentlessly steep fire road. ...
      Apr 1, 2018 @ 9:12pm
      Apr 1, 2018
      user #1204338RammerpantsreportSkywalker SingletrackAlso, this is a green trail!
      Mar 4, 2018 @ 6:33pm
      Mar 4, 2018
      user #1121408SeaBass97trailGoat TrailSuper loose, steep,narrow downhill that really...
      Dec 5, 2017 @ 6:21pm
      Dec 5, 2017

      Nearby Areas

      namedistance
      Big Rock / Novato2.5 km
      Tamarancho / West Marin / North Tam 12 36 29 13.1 km
      China Camp 4 14 95.9 km
      Stafford Lake Bike Park 6 16.3 km
      Marin County Open Space: Rush Creek 26.4 km
      • By brenthillier NSMBA TRAILFORKS Plus & contributors
      • Admins: A4B, MCBC
      • #3979 - 4,202 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
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