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LEGEND
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  • Double Black Diamond

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Trail Conditions
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  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Dry
  • Very Dry
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      Black Diamond Open Space (BDOS), a partnership between Evergreen Mountain Bike Alliance and King County Parks, is a centrally-located area consisting of a stacked loop network of new and existing trails connecting several popular mt biking trail systems together: Henry’s Ridge to the north, Summit Ridge (and Real Life Church) to the south and Lake Sawyer to the west.

      Differing from the techy and twisty trails of Henry, Sawyer, and Summit Ridge, the new trails at BDOS offer riders fun, flowy, and family-friendly rides on which to learn and progress. These trails were constructed with funding from a King County Community Partnership Grant, King County Youth Sports Facility Grant and a grant from REI.

      Through its partnership with King County Parks, Evergreen is currently maintaining the BDOS trails and working on a high level conceptual plan for future new trails in the BDOS area.

      Goals for future trails will be to provide the longest continuous climbs and descents in the entire BD/MV area, as well as to add skill-building trails and features like jumps, drops, and a pump track.

      With the new BDOS trails there are a variety of opportunities for all skill levels all in one area, which will only improve with the completion of Phase 2.
      Primary Trail Type: Cross-Country
      eBikes Allowed: No
      AKA: BDOS
      Parking google parking directions
      Access Info:
      Black Diamond Open Space parking lot is located on the east side of Highway 169, just south of Four Corners in Maple Valley.
      Region Details
      • 2
      • 11
      • 12
      • 3

      Caution on 3 hours
      Local Trail Association
      local trail association
      (evergreenmtb.org)

      Stats

      Avg Trail Rating
      Global Ranking
      #210
      State Ranking
      #8
      Trails
      28
      Total Distance
      12 miles
      Total Descent Distance
      5 miles
      Total Descent
      1,952 ft
      Highest Trailhead
      706 ft
      Total Vertical
      160 ft
      Reports
      332
      Photos
      12
      Ridden Counter
      4,725

      Popular Black Diamond Open Space Mountain Bike Trails

      view all trails »

      Recent Trail Reports

      Current Trail Warnings

      traildateinfo
      Kathleen
      Nov 12, 2018 @ 3:35pm
      3 hours
      Tree down about halfway. Very difficult...
      Cheata
      Nov 12, 2018 @ 3:33pm
      3 hours
      Tree down right in the middle of the berm
      3 Sisters
      Sep 29, 2018 @ 10:29am
      Sep 29, 2018

      Photos of Black Diamond Open Space Mountain Bike

      121 |
      Jul 21, 2017 @ 8:41pm
      Jul 21, 2017
      Fresh Squeezed, Seattle
      104 |
      Jul 21, 2017 @ 8:40pm
      Jul 21, 2017
      Fresh Squeezed, Seattle
      trail: Spooky
      72 |
      Jul 21, 2017 @ 8:40pm
      Jul 21, 2017
      Spooky, Seattle
      trail: Crooshal
      91 |
      Jul 21, 2017 @ 8:40pm
      Jul 21, 2017
      Crooshal, Seattle
      more photos »

      Videos of Black Diamond Open Space Mountain Bike

      Rock & Roll, Remaster, Tarzan, Chilly Bin...
      trail: Tarzan
      9:57 | 12 | Oct 23, 2018 , Maple Valley
      Rock & Roll, Remaster, Tarzan, Chilly Bin...
      trail: Chilly Bin
      9:57 | 7 | Oct 23, 2018 , Maple Valley
      Rock & Roll, Remaster, Tarzan, Chilly Bin...
      trail: Remaster
      9:57 | 13 | Oct 23, 2018 , Maple Valley
      Rock & Roll, Remaster, Tarzan, Chilly Bin...
      9:57 | 11 | Oct 23, 2018 , Maple Valley
      more videos »

      Black Diamond Open Space Mountain Bike Routes

      titleratingdistance
      Full Sasquatch Loop
      2 miles

      Recent Comments

      usernametypetitlecommentdate
      user #1370752KeetnaWilsontrailSasquatchWhile still dangerous, it was most likely a...
      Oct 26, 2018 @ 11:47pm
      Oct 26, 2018
      user #1635294Mtb-carrottrailSasquatchBe careful, i saw a what appeared to be a wolf...
      Oct 26, 2018 @ 10:20pm
      Oct 26, 2018
      user #1639444Wash2160trailSasquatchThe correct distance and average time need to...
      Oct 16, 2018 @ 6:12pm
      Oct 16, 2018
      user #1556605BarkadatrailFresh SqueezedFun, flowy trail, very well maintained. Lily...
      Sep 30, 2018 @ 7:49am
      Sep 30, 2018
      user #1241389yamabraptrailSasquatchIt is all one trail. The old, shorter trail...
      Sep 23, 2018 @ 11:41pm
      Sep 23, 2018
      more »

      Recent Activity

      usernameactiontypetitledate
      user #619922KerplunkaddridelogNov 12, 2018 ride log
      Nov 12, 2018 @ 5:50pm
      42 mins
      user #1156836nwgarywrightaddridelogNov 12, 2018 ride log
      Nov 12, 2018 @ 3:57pm
      3 hours
      user #1655856sommdaaddreportCheata and 1 more
      Nov 12, 2018 @ 3:34pm
      3 hours
      user #1416774CodyfairaddridelogNov 12, 2018 ride log
      Nov 12, 2018 @ 9:55am
      9 hours
      user #1372923RoquebikeaddridelogNov 11, 2018 ride log
      Nov 11, 2018 @ 1:30pm
      1 days
      view more »
      • By overdrive47 & contributors
      • Admins: BDTC
      • #9635 - 6,592 views
      • black diamond open space activity log | embed map of Black Diamond Open Space mountain bike trails | black diamond open space mountain biking points of interest
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