21 miles
Distance
4,178 ft
Climb
-4,178 ft
Descent
1,022 ft
High Point

20 mile lollipop featuring the better trails in Marin near San Francisco: up and down Old Springs and Miwok, down Diaz Ridge and up Middle Green Gulch.

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Details

  • Riding area
  • Difficulty rating
    Blue
  • Route Type
    Loop
  • Direction
    One Direction
  • Physical rating
    Hard
  • Ridelogs
    2
More Stats for Marin Loop - GG Bridge to Muir Beach mountain bike route
  • Altitude min
    12 ft
  • Altitude start
    583 ft
  • Altitude end
    583 ft
  • Grade max
    -34.039%
  • Grade min
    32.675%
  • Distance climb
    10 miles
  • Distance down
    10 miles
  • Distance flat
    2 miles
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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 intendid 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
  • Water Fountain/Source Water Fountain/Source
  • Sight Sight
  • Restrooms Restrooms
  • Gate Gate
  • Camping Camping
  • Trail Sign Trail Sign
  • Table or Bench Table or Bench
  • Table or Bench eBike Charging Point
  • Other Other
      Trail transparency
      Skids...Repack Coaster Brake Test
      Skids...Repack Coaster Brake Test
      trail: Miwok Road
      5:27 | 1693 | comments: 1 | favs:
      Nov 11, 2014
      The Hillbilly Bomber Bros./ Miwok Chapter Bendix coaster brake test after recent failure that sent the believer home cryink. Klunker Cruiser
      Self Edit Miwok
      Self Edit Miwok
      trail: Miwok Road
      0:23 | 179 | comments: 0 | favs: 1
      May 10, 2014
      ...
      Oliver Parkin - Miwok Trail
      Oliver Parkin - Miwok Trail
      1:52 | 500 | comments: 1 | favs: 3
      Apr 1, 2013
      The song is Finale by Madeon

      Recent Trail Reports Along Route

      statustraildateconditiondescription
      Diaz Ridge
      Apr 7, 2019 @ 9:27am
      Apr 7, 2019
      a little sloppy but not too bad
      Middle Green Gulch
      Apr 7, 2019 @ 9:27am
      Apr 7, 2019
      dry no issues
      Miwok Trail
      Feb 10, 2019 @ 8:59am
      Feb 10, 2019
      Coastal Trail (Conzelman/Bunker)
      Feb 10, 2019 @ 8:59am
      Feb 10, 2019
      Valley Trail Connector
      Feb 10, 2019 @ 8:59am
      Feb 10, 2019
      more reports »
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