Bellevue, WA | Saturday, October 31, 2026Registration OpenFun / Novelty
Welcome to the 2025 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 a portion of every entry going to KC Parks. OCTOBER'S RACE ONLY - COSTUME CONTEST/CHALLENGE: The October Cougar Mountain races fall a few days before Halloween so let's see who can get into the spirit and run some trails in costume. UPDATE - there will be an award for best costume (any distance) and best group costume (any distance). Winners will receive a gift certificate and a unique trophy from Otter Pawz Lazer . October 7.6-Mile Cross Country // Cougar Cup - The 7.6-Mile Race is a team race - individuals are still eligible to run the 7.6 mile race for podium awards but not the Cougar Cup . The Cougar Cup is open to any team, group or club. In order to participate in the event, teams must sign-up the morning of the race and declare who is on the team. All team members must sign a waiver and list an emergency contact who is not racing. All teams must pay the entry fee of $180. This is a mixed team event and 2 women must score for each team. Teams can consist of 4-6 people with 4 people scoring and 2 displacing. There will be a cup handed out to the winning team. Team captains need to fill out this survey, and communicate information to other team members. Events May 10: 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 14 : 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 12 : 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 9: 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 25 : 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 Cr