The Bellingham Bay Marathon, Half Marathon, 10K, 5K and full marathon relay (for groups of 2-5) is a group of races designed by runners for runners and walkers. Founded in 2007 by the Bellingham Bay Swim Team, BBM delivers a fun, highly personal, authentic race experience. 100% of net proceeds benefit Whatcom County youth non-profit organizations – for further information, please visit our Beneficiaries page.