The Cougar Mountain Trail Running Series, organized by the Seattle Running Club and Northwest Trail Runs, features exciting trail races in King County’s Cougar Mountain Regional Wildland Park.

This year is the 22nd running of this event. Proceeds from the series support King County Parks, with more than $254,000 donated since the start of the series.

Register here to join the monthly summer trail races at Cougar Mountain. King County employees can receive a 20% discount with the code KCPEmployee_25.