Cougar Mountain Trail Run Series (August)
Sat, Aug 8, 2026, 4:30 AM PDT
- Type
- Run
Finish signup on the organizer site (check fees and dates there).
Race feel
Experience the lush trails of Cougar Mountain while supporting King County Parks. A challenging and scenic run for the trail community.
- Scenic
- Competitive
- For a Cause
Scenic
Competitive
For a CauseGreat for
- All Genders Welcome
All Genders WelcomeJoin the Cougar Mountain Trail Run Series for a rewarding experience on the beautiful trails of Bellevue, WA. This August event, part of a popular series, offers a marathon distance through lush forests, rolling hills, and wetland habitats. Beyond the scenic challenge, your participation supports King County Parks, with a portion of each entry dedicated to their stewardship. Connect with the trail running community and enjoy post-race refreshments while contributing to a meaningful cause.
From the organizer
Welcome to the 2026 edition of the Cougar Mountain Trail Run Series, put on by Seattle Running Club and Northwest Trail Runs . Our events support King County Parks , with $15 of every entry going to KC Parks.
Events
May 9 : 5.1 Miles & 10.8 Miles 9 AM start for all races, 12:00 PM cut-off (~16:40 pace for 10.8 miles)
June 13 : 5K, 8.2 Miles & 14.5 Miles 9 AM start for all races, 1:00 PM cut-off (~16:35 pace for 14.5 miles)
July 11 : 5K, 10.8 Miles & 19.5 Miles 9 AM start for all race, 2:30 PM cut-off (~16:55 pace for 19.5 miles)
August 8 : 5K, 14.5 Miles & 26.2 Miles 8:30 AM start for the 14.5 and 26.2, 9 AM start for the 5K, 4 PM cut-off (~17:10 pace for the marathon)
October 24 : 5K, 7.6 Mile Cross Country, 19.5 Miles & 50K 8 AM start for the 19.5 and 50K (7 AM early start will be available), 9 AM start for 7.6 Miles and Cross Country event, 9:30 AM start for 5K, 5 PM Cut-off (~17:25 pace for 50K, ~19:30 pace for early start)
Series (BEST 3 OUT OF 4 RACES is eligible for awards): Short Series : May 5.1 Miles, June 8.2 Miles, July 10.8 Miles & August 14.5 Miles Long Series : May 10.8 Miles, June 14.5 Miles, July 19.5 Miles, August 26.2 Miles Top overall Man, Woman, and Nonbinary runners based on cumulative time will receive an award and free entry into next year's series.
If you are a Seattle Running Club member and want to use your membership discount on the short or long series, please signup for the series using the short pass or long pass and then send the race director (races@seattlerunningclub.org) an email with your SRC member number. You will receive a partial refund within 5 business days. For all other races, please use the coupon code given to Seattle Running Club members--if you do not know the member code, please email the race director with your member number to get the code).
Online registration closes at 11:59 PM PDT the Wednesday before each event. We will have day-of registration if you did not register in time.
Reasons to Sign Up 1) Well-marked trails with distances that are perfect for all experience levels 2) Community: Surround yourself with members of the trail-running community 3) Post-race food and libations, including beer provided by one of our Club's partner stores, Flying Lion Brewery 4) Raise money for King County Parks: $15/runner donated to the parks
Awards
Food & Drink