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4,793 ft
Distance
-5 ft
Descent
00:10:53
Avg time
-7 ft
Altitude change
546 ft
Altitude min
553 ft
Altitude max
553 ft
Altitude start
548 ft
Altitude end
-0.2%
Grade
-2.9%
Grade max
2.5%
Grade min
167 ft
Distance climb
374 ft
Distance down
3,914 ft
Distance flat
00:10:53
Avg time
Brain Wave Details
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Activities
- Mountain Bike
- Hike
- Trail Running
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Riding AreaBlack Diamond Open Space
Maple Valley, Washington -
Difficulty Rating
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Voted DifficultyGreen (1 vote)
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Local Popularity80 in Mountain Biking [+]
- 45 in Trail Running
- 50 in Hiking
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Global Ranking
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Trail TypeSingletrack
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Bike TypeAM, XC
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DirectionBoth Directions[+]
- Both Directions for Trail Running
- Both Directions for Hiking
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Climb DifficultyGreen
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Physical RatingEasy
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Dogs AllowedYes
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eBike Allowed
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TTFs on TrailBerm
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Ride in RainYes
Brain Wave offers one of the best flat flow sections in BDOS and one of the more technical intermediate trails in the area. Brain Wave is easily distinguished into two very different sections. The first, from Spooky to Grassy is fast, fun and flowy, and easily just a green. After Grassy and all the way to the Sasquatch is a much more technical trail, which is what earns Brain Wave its intermediate status. While the tech isn't anything special, compared to the mellower XC trails offered here, it's something to challenge progressing riders. The trail is most technical on the north side of the Powerline Road near Sasquatch Extension. If you are a beginner, or simply want to avoid the tech of the second half simply turn right on Grassy Road at the intersection and then either continue to the Powerline Road, or turn right on Grassy, which will take you right back to Spooky.
Access Info
Easiest to access off of Spooky, at the first fork in the trail follow the signs for Brain Wave to the left.
Local Trail Association
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trail development & maintenance.
Traditionally Indigenous Territory
Recent Activity on Trail
Past Week
- 3 rides
- 7 miles average
6 Months
- 86 rides
- 10 miles avg distance
All
- 1,035 rides
- Last: Jun 20, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
Brain Wave Trail Reports
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Trail Conditions
- Unknown
- Snow Groomed
- Snow Packed
- Snow Covered
- Snow Cover Partial
- Freeze/thaw Cycle
- Icy
- Prevalent Mud
- Wet
- Variable
- Ideal
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- Very Dry
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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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- > 6 months
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- Both Directions
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- Uphill Only
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Directions to brain-wave trailhead
(47.343390, -122.012940)
Photos
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Videos
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Routes with this trail
★ 3.0 • 15 miles • 976 ft • 50 • Point to Point •
This route hits all the advanced trails.
5 miles • 250 ft • 22 •
Base training route for the griffins at Black Diamond
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Nearby Trails
- Powerline Road 928 ft
- Brain Bucket 1,345 ft
- Grassy 1,444 ft
- Master Link 1,532 ft
- 3rd Line 1,532 ft
Black Diamond Open Space
- By boxxerace
TRAILFORKS EMBA-BOD & contributors - #81290 - 2,573 views
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Frequently Asked Questions About Brain Wave
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Where is Brain Wave located?
Brain Wave is located in Black Diamond Open Space, Maple Valley, Washington, United States. It is part of the Black Diamond Open Space trail network. The trailhead is located at coordinates 47.34339, -122.01294.
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How hard is Brain Wave?
Brain Wave is rated as Blue difficulty. The physical rating is Easy. The average grade is 0.2%. The climb difficulty is rated Green.
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What is the elevation gain for Brain Wave?
The trail has 5 ft of elevation descent. The elevation ranges from 546 ft to 553 ft.
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Is Brain Wave a point to point trail?
Brain Wave is not a point to point trail. The direction is Both Directions. The trail type is singletrack.
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