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Trail Flow (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.
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Trail Last Ridden
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Trail Ridden Direction
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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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.
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Jump Magnitude Heatmap
Heatmap of where riders jump on trails. Zoom in to see individual jumps, click circles to view jump details.
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SaveBlack 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
Land Status: City Managed
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
- Mountain Bike
25 trails
- Hike
18 trails
- Trail Running
18 trails
Region Details
- 3
- 10
- 9
- 3
Region Status
Caution as of Jan 8, 2023Local 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
- 1,448
- Photos
- 68
- Ridden Counter
- 19,299
Popular Black Diamond Open Space Mountain Biking Trails
Black Diamond Open Space Mountain Bike Routes
| title | rating | distance |
|---|---|---|
| Out and Back Pedal to Flow | 6 miles | |
| Black Diamond 2 | 10 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 |
Photos of Black Diamond Open Space Mountain Bike
trail: BDOS-Lake Sawyer Connector
143 |
Jan 28, 2022 @ 12:22am
Jan 28, 2022
trail: BDOS-Lake Sawyer Connector
88 |
Jan 28, 2022 @ 12:21am
Jan 28, 2022
trail: Sasquatch
118 |
May 22, 2021 @ 1:37pm
May 22, 2021
trail: Master Link
51 |
May 22, 2021 @ 1:37pm
May 22, 2021
trail: Master Link
66 |
May 22, 2021 @ 1:36pm
May 22, 2021
trail: Sasquatch
97 |
Mar 13, 2021 @ 10:50am
Mar 13, 2021
trail: Sasquatch
103 |
Mar 13, 2021 @ 10:50am
Mar 13, 2021
trail: Fresh Squeezed
130 |
Mar 13, 2021 @ 10:19am
Mar 13, 2021Videos of Black Diamond Open Space Mountain Bike
trail: Kathleen
2:07 |
295 |
Mar 19, 2019
trail: Spooky
4:30 |
61 |
Mar 6, 2019
trail: Spike
0:55 |
281 |
Oct 16, 2016
trail: Spike
3:22 |
359 |
Jun 25, 2014
trail: Spike
1:22 |
108 |
Feb 7, 2014
trail: Broken Arm
2:20 |
591 |
Oct 9, 2011
trail: Broken Arm
1:18 |
336 |
Sep 30, 2011
trail: Broken Arm
1:29 |
4005 |
Jul 27, 2011
Current Trail Warnings
| status | trail | date | condition | user | info |
|---|---|---|---|---|---|
| Cheata | Jan 14, 2023 @ 1:32am Jan 14, 2023 | Dry | puch532 |
Recent Trail Reports
| status | trail | date | condition | info | user |
|---|---|---|---|---|---|
| Remaster | Jan 28, 2023 @ 2:22am Jan 28, 2023 | Ideal | Awkragt | ||
| Chilly Bin | Jan 27, 2023 @ 6:22pm Jan 27, 2023 | Ideal | Awkragt | ||
| Fresh Squeezed | Jan 27, 2023 @ 6:22pm Jan 27, 2023 | Ideal | Awkragt | ||
| Crooshal | Jan 27, 2023 @ 6:22pm Jan 27, 2023 | Ideal | Awkragt | ||
| Tarzan | Jan 27, 2023 @ 6:22pm Jan 27, 2023 | Ideal | Awkragt | ||
| Kathleen | Jan 27, 2023 @ 6:22pm Jan 27, 2023 | Ideal | Awkragt | ||
| Route 66 | Jan 20, 2023 @ 5:11pm Jan 20, 2023 | Ideal | Gunrocks | ||
| Brain Wave | Jan 20, 2023 @ 5:06pm Jan 20, 2023 | Dry | Gunrocks | ||
| Connector | Jan 13, 2023 @ 5:08pm Jan 13, 2023 | Ideal | cwisa1 | ||
| Rock & Roll | Jan 13, 2023 @ 5:08pm Jan 13, 2023 | Ideal | cwisa1 |
Activity Feed
| username | action | type | title | date | |
|---|---|---|---|---|---|
 | Awkragt | vote | trail | Fresh Squeezed and 3 more | Feb 3, 2023 @ 1:16pm 2 days |
| NathanO27V02 | ridden | trail | Rock & Roll and 8 more | Jan 30, 2023 @ 12:48am Jan 30, 2023 |
| Awkragt | add | report | Remaster and 5 more | Jan 28, 2023 @ 9:09pm Jan 28, 2023 |
| trailfoot | wishlist | trail | Fresh Squeezed | Jan 22, 2023 @ 6:21pm Jan 22, 2023 |
| jasonlA3Piq | ridden | trail | Sasquatch and 2 more | Jan 21, 2023 @ 7:25am Jan 21, 2023 |
Recent Comments
| username | type | title | comment | date | |
|---|---|---|---|---|---|
| trail | Meh, fading been into the woods | Nov 12, 2022 @ 2:17pm Nov 12, 2022 | ||
| trail | Straightforward loop; very good for beginners... | Oct 27, 2022 @ 6:27pm Oct 27, 2022 | ||
| trail | Slightly overgrown near the end but passable | Jul 9, 2022 @ 1:49pm Jul 9, 2022 | ||
| trail | Right at the end you start to get more speed... | Jun 4, 2022 @ 4:14pm Jun 4, 2022 | ||
| trail | Punchy but short downhill. Uphill portion... | Jun 1, 2022 @ 11:53am Jun 1, 2022 |
Nearby Areas
| name | distance | ||||
|---|---|---|---|---|---|
| Summit Ridge | 7 | 8 | 3 | 4 | 0.6 km |
| Henry's Ridge Open Space | 9 | 20 | 5 | 0.7 km | |
| Lake Sawyer | 10 | 53 | 2 | 1.1 km | |
| Green River Gorge | 1 | 4.1 km | |||
| Kanaskat-Palmer State Park | 12 | 1 | 5.2 km |
Local Badges
-
Completionist20 awarded
Local Products
Activity Type Stats
| activitytype | trails | distance | descent | descent distance | total vertical | rating | global rank | state rank | photos | reports | routes | ridelogs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mountain Bike | 25 | 12 miles | 1,345 ft | 4 miles | 161 ft | #292 | #139 | 68 | 1,446 | 2 | 12,073 | |
| Hike | 18 | 10 miles | 719 ft | 3 miles | 157 ft | #429 | #267 | 1,359 | 45 | |||
| Trail Running | 18 | 10 miles | 719 ft | 3 miles | 157 ft | #430 | #266 | 1,359 | 145 |
- By overdrive47 & contributors
- Admins: BDTC
- #9635 - 44,382 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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