close
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.
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
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
- 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 Head
Photo
Directory Listing
Riding Area
TTF
Parking
Viewpoint
Information
Warning
Directions
Sight
Restrooms
eBike Charging Point
Water Fountain/Source
Gate
Trail Sign
Table or Bench
Ladder
Stairs
Bridge
Camping
Cabin
Lodge
Bear Cache
Dock
Ranger Station
Summit
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
- 10
- 11
- 3
Activities
Region Status
Open as of Oct 13, 2019
Stats
- Avg Trail Rating
- Global Ranking
- #178
- State Ranking
- #8
- Trails (view details)
- 26
- Trails Mountain Bike
- 26
- Trails Hike
- 19
- Trails Trail Running
- 19
- Total Distance
- 11 miles
- Total Descent
- 1,499 ft
- Total Vertical
- 160 ft
- Highest Trailhead
- 706 ft
- Reports
- 607
- Photos
- 24
- Ridden Counter
- 8,818
Popular Black Diamond Open Space Mountain Biking Trails
Black Diamond Open Space Mountain Bike Routes
| title | rating | distance |
|---|---|---|
| Full Sasquatch Loop | 2 miles | |
| 13 mile Black Diamond Open Space Ride | popular ridelog | 13 miles |
| 11 mile Black Diamond Open Space All-Mountain Ride | popular ridelog | 11 miles |
| 10 mile Black Diamond Open Space All-Mountain Ride | popular ridelog | 10 miles |
| 9 mile Black Diamond Open Space All-Mountain Ride | popular ridelog | 9 miles |
| 11 mile Black Diamond Open Space Ride | popular ridelog | 11 miles |
| 10 mile Black Diamond Open Space Ride | popular ridelog | 10 miles |
Recent Ridelog Activity in Region
Today
- 2 rides
- 8 miles avg distance
Yesterday
- 0 rides
- 0 ft avg distance
Past Week
- 19 rides
- 7 miles avg distance
Videos of Black Diamond Open Space Mountain Bike
trail: Kathleen
2:07 |
60 |
Mar 19, 2019
trail: Spooky
4:30 |
18 |
Mar 6, 2019
trail: Fresh Squeezed
7:29 |
204 |
Mar 20, 2019 , Maple Valley
trail: Sasquatch
14:20 |
179 |
Mar 20, 2019 , Maple Valley
Recent Trail Reports
| status | trail | date | condition | user | info |
|---|---|---|---|---|---|
| Tarzan | Oct 13, 2019 @ 1:15pm Oct 13, 2019 | Variable | Awkragt | ||
| Rock & Roll | Sep 21, 2019 @ 9:47am Sep 21, 2019 | Variable | padrefan1982 | ||
| Crooshal | Sep 21, 2019 @ 9:47am Sep 21, 2019 | Variable | padrefan1982 | ||
| Kathleen | Sep 21, 2019 @ 9:47am Sep 21, 2019 | Variable | padrefan1982 | ||
| Blind Pig | Sep 17, 2019 @ 9:09am Sep 17, 2019 | Variable | pepperhoppin | ||
| Fresh Squeezed | Sep 14, 2019 @ 2:54pm Sep 14, 2019 | Variable | Awkragt | ||
| Connector | Sep 14, 2019 @ 2:54pm Sep 14, 2019 | Variable | Awkragt | ||
| Remaster | Aug 17, 2019 @ 1:24pm Aug 17, 2019 | Dry | skuehn | ||
| Spooky | Aug 17, 2019 @ 1:24pm Aug 17, 2019 | Dry | skuehn | ||
| Spike | Aug 17, 2019 @ 1:24pm Aug 17, 2019 | Dry | skuehn |
Activity Feed
| username | action | type | title | date | |
|---|---|---|---|---|---|
 | Springer125 | ridden | trail | Kathleen | Oct 16, 2019 @ 11:27pm Oct 16, 2019 |
| Los349 | ridden | trail | Crooshal and 10 more | Oct 15, 2019 @ 5:20pm Oct 15, 2019 |
| Springer125 | ridden | trail | Rock & Roll | Oct 14, 2019 @ 8:53pm Oct 14, 2019 |
| Awkragt | add | report | Tarzan | Oct 13, 2019 @ 5:30pm Oct 13, 2019 |
 | dubiouslogik | ridden | trail | Brain Wave and 6 more | Oct 2, 2019 @ 3:14pm Oct 2, 2019 |
Recent Comments
| username | type | title | comment | date | |
|---|---|---|---|---|---|
 | trail | xD | Jul 10, 2019 @ 2:04pm Jul 10, 2019 | ||
 | trail | one of the top trails in Washington | Jun 29, 2019 @ 4:56pm Jun 29, 2019 | ||
 | trail | This is a fun trail with a challenging... | Jun 1, 2019 @ 12:12pm Jun 1, 2019 | ||
| trail | Easy and flows I always hit this whenever... | Mar 27, 2019 @ 3:13pm Mar 27, 2019 | ||
| trail | Is this even a trail | Mar 27, 2019 @ 3:11pm Mar 27, 2019 |
Nearby Areas
| name | distance | ||||
|---|---|---|---|---|---|
| Summit Ridge | 7 | 6 | 3 | 4 | 0.6 km |
| Henry's Ridge | 11 | 19 | 6 | 0.7 km | |
| Lake Sawyer | 7 | 44 | 2 | 1 | 1.1 km |
| Green River Gorge | 1 | 4.1 km | |||
| Selleck | 6.1 km |
Local Badges
-
Completionist4 awarded
- By overdrive47 & contributors
- Admins: BDTC
- #9635 - 11,463 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
- subscribe 3d map donate to earn trail karma!
Downloading of trail gps tracks in kml & gpx formats is enabled for Black Diamond Open Space.
You must login to download files.