Lace up for a fantastic community celebration on Saturday, June 20, 2026, in Merrimac when the 10th annual Jamaco River Run takes over Waterhouse Field with a USATF-certified 5K, a Kids Fun Run starting at 9am, and the main 5K kicking off at 10am. You'll enjoy free parking, registration beginning at 8am, and the first 200 finishers receive a commemorative shirt and complimentary beer (for those 21+), plus stick around for live music, craft beer, food, kids' activities, awards, and raffle prizes after the race. Best of all, your participation supports a great cause as proceeds benefit the local community!