Big Backyard 5K
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Race Information
The Big Backyard 5K is a community run/walk showcasing King County Parks regional trails. Proceeds from the BBY5K benefit King County Parks in support of maintenance and operation of facilities and recreational resources. Bring your friends, kids and 4-legged running buddy
Run Pick of the Month - Ultra Fest
Introducing Ultra Fest. Re-vamped Cascade Super Ultra!
New 100k and 100 mile distance happens September 21-22, 2024.
At Ultra Fest you'll have the option to run 50k, 50 miles, 100k, or 100 miles through some of the most awe-inspiring landscapes that Mother Nature has to offer in the Pacific Northwest!
Updates for 2024 include the new 100k and 100 mile distances, faster courses, and a new location with on-site parking so that you can roll back to your car post-finish.
Click the button below to get all the details!
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Registration Info
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