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BDOS dig day presented by TREK Tukwila

04/02/2023,  9:00 am -  1:00 pm
Work Parties
Cascades to Sound
Registration is closed


Black Diamond Open Space (BDOS) DIG DAYS
Presented by TREK Tukwila

Join us for our monthly trail maintenance series at BDOS in Maple Valley.

The 1,240-acre forested Black Diamond Open Space (BDOS) is located two miles north of Black Diamond and six miles south of Maple Valley, and is a popular destination for mountain bikers and hikers alike.  This special park contains portions of a protected migratory corridor called the Wildlife Habitat Network. It also contains streams, peat bogs, and wetlands.

It's recommended that you bring a small cable lock to lock up your bike while working. We usually step away from the main clearing as we work on the trails, and while I'd love to say your bike is secure with us on the trail or on your vehicle, it's nice to have the extra security of a lock.

There's a lot that goes into keeping these well-loved community trails in tip top shape. Work parties usually involve lots of cutting back overgrown brush, clearing drains, and making basic repairs to the trail tread. Whether it's your first, or one-hundredth work party, we got you! 


We'll be meeting at 9am before heading into the work site. The meeting location will be at the main parking BDOS parking lot, located here: https://goo.gl/maps/QXrRbJtfdxQHrwcg6

Questions? E-mail Jeremy at 



  • Work Gloves (Required)
  • Sturdy Footwear (Boots recommended)
  • Clothing for all weather (sun or rain?! Layers are helpful)
  • Backpack with water and snacks, please do not share with others
  • Bike and riding gear if you want to go for a pedal after

Evergreen Will Provide:

  • Tools
  • Trail building know-how and stoke!