close
Trail Conditions
- Unknown
- Snow Groomed
- Snow Packed
- Snow Covered
- Freeze/thaw Cycle
- Icy
- Prevalent Mud
- Wet
- Variable
- Ideal
- 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
ATV/ORV/OHV Filter
Max Vehicle Width
inches
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
- Ideal
- 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
- 9
- 9
- 3
Activities
Region Status
Caution as of Jul 30, 2020Local Trail Association
Stats
- Avg Trail Rating
- Trails (view details)
- 23
- Trails Mountain Bike
- 23
- Trails Hike
- 16
- Trails Trail Running
- 16
- Total Distance
- 11 miles
- Total Descent
- 1,440 ft
- Total Vertical
- 160 ft
- Highest Trailhead
- 706 ft
- Reports
- 813
- Photos
- 38
- Ridden Counter
- 11,902
Popular Black Diamond Open Space Mountain Biking Trails
Black Diamond Open Space Mountain Bike Routes
| title | rating | distance |
|---|---|---|
| 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
- 0 rides
- 0 ft avg distance
Yesterday
- 7 rides
- 7 miles avg distance
Past Week
- 49 rides
- 7 miles avg distance
Photos of Black Diamond Open Space Mountain Bike
trail: Grassy Road
16 |
Jul 6, 2020 @ 1:11pm
Jul 6, 2020
trail: Little Something Special
57 |
Mar 9, 2020 @ 6:31pm
Mar 9, 2020
trail: Little Something Special
41 |
Mar 9, 2020 @ 6:31pm
Mar 9, 2020
trail: Powerline Road
29 |
Jan 20, 2020 @ 9:15pm
Jan 20, 2020
Current Trail Warnings
| status | trail | date | condition | user | info |
|---|---|---|---|---|---|
| Brain Wave | Jul 8, 2020 @ 4:31pm Jul 8, 2020 | Ideal | bpercival | The section under the power lines is very... | |
| Supercharger | Jul 8, 2020 @ 12:51pm Jul 8, 2020 | Dry | bpercival | The trail is still very overgrown with... |
Recent Trail Reports
| status | trail | date | condition | user | info |
|---|---|---|---|---|---|
| Remaster | Jul 30, 2020 @ 7:22pm Jul 30, 2020 | Ideal | DenisLM | ||
| Chilly Bin | Jul 30, 2020 @ 7:22pm Jul 30, 2020 | Ideal | DenisLM | ||
| Sasquatch | Jul 27, 2020 @ 6:42pm Jul 27, 2020 | Ideal | DenisLM | ||
| Fresh Squeezed | Jul 20, 2020 @ 12:38pm Jul 20, 2020 | Ideal | kastanridesbikes | ||
| Little Something Special | Jul 19, 2020 @ 12:12pm Jul 19, 2020 | Dry | Seabass1975 | ||
| Connector | Jul 18, 2020 @ 6:53pm Jul 18, 2020 | Ideal | JiuJitsuMike | ||
| Crooshal | Jul 18, 2020 @ 6:53pm Jul 18, 2020 | Variable | JiuJitsuMike | ||
| Tarzan | Jul 18, 2020 @ 6:53pm Jul 18, 2020 | Ideal | JiuJitsuMike | ||
| Rock & Roll | Jul 18, 2020 @ 6:53pm Jul 18, 2020 | Wet | JiuJitsuMike | ||
| Spike | Jul 18, 2020 @ 10:37am Jul 18, 2020 | Variable | paulrbrown |
Activity Feed
| username | action | type | title | date | |
|---|---|---|---|---|---|
 | TheRDR | ridden | trail | Rock & Roll and 5 more | Aug 4, 2020 @ 1:49pm 16 hours |
 | ramasterson | comment | trail | Supercharger | Aug 1, 2020 @ 3:47pm Aug 1, 2020 |
| Djserd | ridden | trail | Rock & Roll and 5 more | Jul 31, 2020 @ 10:41pm Jul 31, 2020 |
| DenisLM | add | report | Remaster and 1 more | Jul 31, 2020 @ 3:54pm Jul 31, 2020 |
| Frdbronco8 | vote | trail | Sasquatch | Jul 29, 2020 @ 10:12pm Jul 29, 2020 |
Recent Comments
| username | type | title | comment | date | |
|---|---|---|---|---|---|
| trail | Completely overgrown as of 8/1. Take Croshool... | Aug 1, 2020 @ 3:47pm Aug 1, 2020 | ||
| trail | This is a fun, twisty section of trail in a... | Jul 8, 2020 @ 4:40pm Jul 8, 2020 | ||
| trail | The brush is getting thick but the trail still... | Jun 30, 2020 @ 11:19am Jun 30, 2020 | ||
| trail | Trail is super overgrown to the point where... | Jun 27, 2020 @ 10:04pm Jun 27, 2020 | ||
| trail | This is an awesome trail. One of my favorites... | Apr 9, 2020 @ 8:29pm Apr 9, 2020 |
Nearby Areas
| name | distance | ||||
|---|---|---|---|---|---|
| Summit Ridge | 7 | 7 | 3 | 4 | 0.6 km |
| Henry's Ridge | 11 | 20 | 6 | 0.7 km | |
| Lake Sawyer | 7 | 45 | 2 | 1 | 1.1 km |
| Green River Gorge | 1 | 4.1 km | |||
| Selleck | 6.2 km |
Local Badges
-
Completionist14 awarded
- By overdrive47 & contributors
- Admins: BDTC
- #9635 - 18,171 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.