Lake Sammamish Half Marathon

Come out and test your mettle at 4th Dimension Racing's Lake Sammamish Half Marathon. The course begins and ends at Marymoor Park, beginning at 9 am.

Advanced registration is available at the website, and shuttle service is available from the registration site to the starting line for an extra fee. Registration includes chip-timing, finisher award, and T-shirt.

Organizers are seeking volunteers to help manage the start and finish, photograph runners, and to man the aid stations to be located every four or five miles along the route.