A USATF CERTIFIED course the Lake Washington half starts and finishes at Juanita Beach Park in Kirkland. The Lake Washington Half marathon is a beautiful loop course that starts and finishes and Juanita Beach Park in Kirkland. You’ll run along the shores of Lake Washington and through the charming neighborhoods of Kirkland. Produced by Orca Running, the Lake Washington Half is a great end-of-season half to cap off your year of running. Come run with us!