- Come join us for the 3rd annual Castle Awards Half Marathon/5k on June 7th 2015 at the Seekonk YMCA in Seekonk ,MA. This race ricks off at 8am and will take you throughout the beautiful countryside of Sekonk and Rehoboth,MA. There will be 6 water stops and 2 restrooms on the course as wel as plenty of volunteers as well as a lead car and a follow car. most of the couse is flat with a couple of small hill to keep you honest .