NO DAY OF RUN REGISTRATION
Online Pre-Registration Deadline Friday, August 9, 5:00pm.
Mail-in Deadline, Saturday, August 3.
Check out the photo-video preview of the 5-mile loop HERE!
Thanks to runners like you, this series has raised over $111,000 for
King County Parks and contributed many hundreds of hours of trail work. Join
Seattle Running Club and Northwest Trail Runs in carrying this legacy forward and making this 11th annual event bigger and better than ever!

NEW for this year, there will be two concurrent series-- a short series and a long series. As always, the mileage builds over the summer, providing both an ideal beginner introduction to trail running and a perfect preparation for a fall marathon or ultra for trail veterans.
Just 15 minutes from Seattle,
King County's Cougar Mountain Regional Wildland Park, is a trail running paradise thanks to its rolling and runnable hills and trail variety ranging from narrow and technical to wide and groomed. Run through lush forest, fern-lined single-track, over hills and along marshes, just minutes from the city.
This is the FOURTH and final event in the Series, featuring a 13 and 26-mile option. The series runs on the second Saturday of each month:
The July and August events will also feature a 5k distance for those trail runners just starting out!
Want to keep going? We'll return to Cougar on October 27 for a 20-mile and 50k!

These events fill up quickly!
Depending on space availability, registration may also be availble on site on the day of the event with an added fee.