Join Castle Island Track Club for the 3rd Annual King of the Castle, our favorite summer tradition. This is a completely unsanctioned, self-timed 10K around the iconic Castle Island loop. No bibs. No official timing. Just you, your watch, and a fast field ready to battle for the crown. Tickets: https://www.eventbrite.com/e/3rd-annual-king-of-the-castle-unsanctioned-10k-tickets-1993360194000