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The colour categories are based on what percentage of riders are riding a trail in its intended direction.
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The intended direction a trail should be ridden.
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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.
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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
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Trails are colored based on popularity. The more popular a trail is, the more red. Less popular trails trend towards green.
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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
      Land Status: City Managed
      Powerline Trailhead 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.
      Activities Click to view
      Region Details
      • 3
      • 10
      • 9
      • 3

      Region Status
      Caution as of Apr 19, 2024
      Local Trail Association

      Stats

      Avg Trail Rating
      Trails (view details)
      25
      Trails Mountain Bike
      25
      Trails Hike
      18
      Trails Trail Running
      18
      Total Distance
      12 miles
      Total Descent
      1,346 ft
      Total Vertical
      160 ft
      Highest Trailhead
      706 ft
      Reports
      1,571
      Photos
      75
      Ridden Counter
      22,137

      Photos of Black Diamond Open Space Mountain Bike

      trail: Brain Bucket
      19 |
      Nov 5, 2023 @ 3:07pm
      Nov 5, 2023
      42 |
      Jun 24, 2023 @ 7:30pm
      Jun 24, 2023
      trail: Blind Pig
      84 |
      May 22, 2023 @ 12:13pm
      May 22, 2023
      trail: Blind Pig
      54 |
      May 22, 2023 @ 12:13pm
      May 22, 2023
      236 |
      Jan 28, 2022 @ 12:22am
      Jan 28, 2022
      160 |
      Jan 28, 2022 @ 12:21am
      Jan 28, 2022
      trail: Sasquatch
      158 |
      May 22, 2021 @ 1:37pm
      May 22, 2021
      trail: Master Link
      72 |
      May 22, 2021 @ 1:37pm
      May 22, 2021

      Videos of Black Diamond Open Space Mountain Bike

      Tour of Kathleen with JJ
      trail: Kathleen
      2:07 | 347 | Mar 19, 2019
      Tour of Spooky with JJ
      trail: Spooky
      4:30 | 72 | Mar 6, 2019
      Golden Spike Edit
      trail: Spike
      0:55 | 291 | Oct 16, 2016
      G Spike
      trail: Spike
      3:22 | 372 | Jun 25, 2014
      Golden Spike trail
      trail: Spike
      1:22 | 116 | Feb 7, 2014
      Civic Dirt Jump Sesh
      trail: Broken Arm
      2:20 | 600 | Oct 9, 2011
      Duthie and Chuckanut Jumps...Really bored!
      trail: Broken Arm
      1:18 | 340 | Sep 30, 2011
      Short Ride
      trail: Broken Arm
      1:29 | 4023 | Jul 27, 2011

      Recent Trail Reports

      statustraildateconditioninfouser
      Tarzan
      Apr 19, 2024 @ 4:21pm
      Apr 19, 2024
      IdealJustinLGVvgX
      Crooshal
      Apr 19, 2024 @ 4:21pm
      Apr 19, 2024
      IdealJustinLGVvgX
      Connector
      Apr 19, 2024 @ 4:21pm
      Apr 19, 2024
      IdealJustinLGVvgX
      Master Link
      Apr 19, 2024 @ 4:21pm
      Apr 19, 2024
      IdealJustinLGVvgX
      Spooky
      Apr 19, 2024 @ 4:21pm
      Apr 19, 2024
      IdealAlmost had a heart attack when I scared 6...JustinLGVvgX
      Rock & Roll
      Apr 16, 2024 @ 4:39am
      Apr 16, 2024
      IdealBrianyjN7Vd
      Remaster
      Mar 30, 2024 @ 4:05pm
      Mar 30, 2024
      IdealJustinLGVvgX
      Fresh Squeezed
      Mar 30, 2024 @ 3:12pm
      Mar 30, 2024
      IdealTree is clear. Thank you to whoever...JustinLGVvgX
      Kathleen
      Mar 21, 2024 @ 3:43am
      Mar 21, 2024
      Variablepadrefan1982
      Sasquatch
      Mar 21, 2024 @ 3:43am
      Mar 21, 2024
      Variablepadrefan1982

      Activity Feed

      usernameactiontypetitledate
      denidilcommenttrailactivity #51555988 and 2 more
      Apr 22, 2024 @ 4:00pm
      15 hours
      JustinLGVvgXaddreportactivity #51418675 and 4 more
      Apr 19, 2024 @ 7:30pm
      Apr 19, 2024
      BrianyjN7Vdaddreportactivity #51284011
      Apr 16, 2024 @ 3:08pm
      Apr 16, 2024
      pedroaa23wishlistregionactivity #51220834
      Apr 15, 2024 @ 8:07am
      Apr 15, 2024
      JdDombekvotetrailactivity #51132638
      Apr 13, 2024 @ 2:32pm
      Apr 13, 2024

      Recent Comments

      usernametypetitlecommentdate
      denidiltrailTarzanToo narrow to be a proper green, like...
      Apr 22, 2024 @ 4:00pm
      15 hours
      denidiltrailRemasterToo narrow to be a proper green, like...
      Apr 22, 2024 @ 4:00pm
      15 hours
      denidiltrailRock & RollToo narrow to be a proper green, like...
      Apr 22, 2024 @ 4:00pm
      15 hours
      MousexxxHousetrailCrooshalUpdate to my last comment (can’t edit). The...
      Apr 2, 2024 @ 6:16pm
      Apr 2, 2024
      MousexxxHousetrailCrooshalAs of spring 2024 Supercharger and Crooshal...
      Apr 2, 2024 @ 6:11pm
      Apr 2, 2024

      Nearby Areas

      namedistance
      Summit Ridge 7 8 3 40.6 km
      Henry's Ridge Open Space 10 22 40.7 km
      Lake Sawyer 10 50 21.1 km
      Legacy Park 162.2 km
      Cedar Creek Park 4 63.5 km

      Local Badges


      Activity Type Stats

      activitytypetrailsdistancedescentdescent distancetotal verticalratingglobal rankstate rankphotosreportsroutesridelogs
      Mountain Bike2512 miles1,345 ft4 miles161 ft
      #305#150751,569315,036
      Hike1810 miles719 ft3 miles157 ft
      #455#2841,47360
      Trail Running1810 miles719 ft3 miles157 ft
      #458#2841,473173
      • By overdrive47 & contributors
      • Admins: BDTC, EMBA-C2S
      • #9635 - 55,820 views

      Downloading of trail gps tracks in kml & gpx formats is enabled for Black Diamond Open Space.
      You must login to download files.