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- Snow Packed
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- Freeze/thaw Cycle
- Icy
- Prevalent Mud
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- 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 Ridden Direction
The intendid direction a trail should be ridden.
- Downhill Only
- Downhill Primary
- Both Directions
- Uphill Primary
- Uphill Only
- One Direction
LEGEND
Trail Difficulties
Trail Report Status
- Access Road/Trail
- White
- Green
- Blue
- Black
- Double Black Diamond
Trail Report Status
- Clear / Green
- Minor Issue / Yellow
- Significant Issue / Amber
- Closed or Major Issue / Red
- 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 Packed
- Snow Covered
- Freeze/thaw Cycle
- Icy
- Prevalent Mud
- Wet
- Variable
- Dry
- Very Dry
- Map Markers
Trail Head
Photo
Directory Listing
Riding Area
TTF
Parking
Viewpoint
Information
Warning
Directions
Water Fountain/Source
Sight
Restrooms
Gate
Camping
Trail Sign
Table or Bench
Other
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.
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.
source: Evergreen MTB Alliance: BDOS
Primary Trail Type: Cross-Country
eBikes Allowed:
No
AKA: BDOS
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
- 9
- 12
- 3
Open on Jan 12, 2019
Stats
- Avg Trail Rating
- Global Ranking
- #188
- State Ranking
- #8
- Trails (view details)
- 26
- Trails Mountain Bike
- 26
- Trails Hike
- 19
- Trails Trail Running
- 19
- Total Distance
- 11 miles
- Total Descent Distance
- 4 miles
- Total Descent
- 1,509 ft
- Total Vertical
- 160 ft
- Highest Trailhead
- 706 ft
- Reports
- 361
- Photos
- 14
- Ridden Counter
- 5,400
Popular Black Diamond Open Space Mountain Biking Trails
| status | title | difficulty | rating |
|---|---|---|---|
| Cheata | |||
| Rock & Roll | |||
| Broken Arm | |||
| Remaster | |||
| Fresh Squeezed | |||
| Crooshal | |||
| Tarzan | |||
| Connector | |||
| Kathleen Access | |||
| Chilly Bin | |||
| Sasquatch | |||
| Spooky |
Recent Trail Reports
more reports »
Current Trail Warnings
| trail | date | info | |
|---|---|---|---|
| 3 Sisters | Sep 29, 2018 @ 10:29am Sep 29, 2018 |
Photos of Black Diamond Open Space Mountain Bike
trail: Fresh Squeezed
136 | Fresh Squeezed, Seattle
Jul 21, 2017 @ 8:41pm
Jul 21, 2017
trail: Fresh Squeezed
115 | Fresh Squeezed, Seattle
Jul 21, 2017 @ 8:40pm
Jul 21, 2017
trail: Spooky
79 | Spooky, Seattle
Jul 21, 2017 @ 8:40pm
Jul 21, 2017
trail: Crooshal
103 | Crooshal, Seattle
Jul 21, 2017 @ 8:40pm
Jul 21, 2017Videos of Black Diamond Open Space Mountain Bike
trail: Tarzan
9:57 |
33 |
Oct 23, 2018 , Maple Valley
trail: Chilly Bin
9:57 |
22 |
Oct 23, 2018 , Maple Valley
trail: Remaster
9:57 |
35 |
Oct 23, 2018 , Maple Valley
trail: Rock & Roll
9:57 |
27 |
Oct 23, 2018 , Maple Valley
Black Diamond Open Space Mountain Bike Routes
| title | rating | distance |
|---|---|---|
| Full Sasquatch Loop | 2 miles |
Recent Comments
| username | type | title | comment | date | |
|---|---|---|---|---|---|
 | trail | Lily Pas was sweet. Step down is an endless... | Dec 6, 2018 @ 6:05pm Dec 6, 2018 | ||
 | trail | While still dangerous, it was most likely a... | Oct 26, 2018 @ 11:47pm Oct 26, 2018 | ||
| trail | Be careful, i saw a what appeared to be a wolf... | Oct 26, 2018 @ 10:20pm Oct 26, 2018 | ||
| trail | The correct distance and average time need to... | Oct 16, 2018 @ 6:12pm Oct 16, 2018 | ||
| trail | Fun, flowy trail, very well maintained. Lily... | Sep 30, 2018 @ 7:49am Sep 30, 2018 |
Recent Activity
| username | action | type | title | date | |
|---|---|---|---|---|---|
| threemcbrides | add | ridelog | Jan 15, 2019 ride log | Jan 19, 2019 @ 1:05pm 14 hours |
 | cvanzan | add | ridelog | Jan 19, 2019 ride log | Jan 19, 2019 @ 11:44am 15 hours |
 | cwisa1 | add | ridelog | Jan 19, 2019 ride log | Jan 19, 2019 @ 11:38am 15 hours |
| Jfair | add | ridelog | Jan 19, 2019 ride log | Jan 19, 2019 @ 11:33am 15 hours |
| Tonylabriola | add | ridelog | Dec 31, 2018 ride log and 1 more | Jan 19, 2019 @ 8:05am 19 hours |
Nearby Areas
| name | distance | ||||
|---|---|---|---|---|---|
| Summit Ridge | 0.3 km | ||||
| Summit Ridge | 7 | 6 | 2 | 3 | 0.6 km |
| Henry's Ridge | 11 | 19 | 6 | 0.7 km | |
| Lake Sawyer | 7 | 44 | 2 | 1 | 1.1 km |
| Green River Gorge | 2 | 4.1 km |
Upcoming Local Events
Local Mountain Bike Directory
-
Black Diamond Trail Coalition
-
Bike Masters Racing Team
![Bike Masters Racing Team]()
-
Tahoma Junior High Mountain Bike Club
Bike Club
-
Bike Masters And Boards
![Bike Masters And Boards]()
Bike Shop
view full directory »
Local Mountain Bike Directory
-
Black Diamond Trail Coalition
-
Bike Masters Racing Team
![Bike Masters Racing Team]()
-
Tahoma Junior High Mountain Bike ClubBike Club
-
Bike Masters And BoardsBike Shop
![Bike Masters And Boards]()
view full directory »
- By overdrive47 & contributors
- Admins: BDTC
- #9635 - 7,094 views
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