Brooks Lake Sammamish Half Marathon, Presented by REI Co-op

The Lake Sammamish Half Marathon takes runners along the smooth trail that connects Marymoor Park in Redmond to Lake Sammamish State Park in Issaquah. We offer a generous 4 hour time limit for all participants. This flat run is perfect for a half-marathon personal best whether you’re running or walking! The Lake Sammamish Half was started in 2010 by Roger Michel and Yumay Chang, and in later years Dana Anderson directed the race to great success. Orca Running was thrilled to be chosen to take over the race, starting in 2021. The REI Co-op Community gets a special discount! Use Code ORCA_REI26 for 15% off the registration fee.