Jamaco River Run
- Date
- June 20, 2026
- Location
- Waterhouse Field, Merrimac, MA
- Distance
- ~5K (3.2 miles) Run/Walk · Kids 1K Fun Run (7 and Under)
From the Organizer
The 10th annual Jamaco River Run and Post-Race celebration will be held on Saturday, June 20, 2026. This is a fun, family-friendly day complete with a Kid's Fun Run, a USATF certified & sanctioned 5K road race, and a post-race event with music, a craft beer tent, burgers and dogs, activities for the kids, award ceremony and an amazing prize raffle. Registration & Bib Pickup will begin at 8am at Waterhouse Field (74 E. Main St, Merrimac, MA). Free parking is available on site. The Kids Fun Run kicks off at 9am followed by the 5K walk/run at 10am. The first 200 registrants receive a custom commemorative t-shirt, and a free beer (21+).
We are excited for 2026 to be our biggest turnout yet, and we once again look forward to giving back to our local community! Thank you for your support!
~ the Jamaco River Run Board of Directors
Distances & Pricing
Race Location
About This Sport
From Endurance Grid's Founder
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Coming Up
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Frequently Asked Questions (FAQs)
- What is the Jamaco River Run?
- Jamaco River Run is a running event held in Merrimac, MA. Learn more about the different endurance sports here.
- When and where is the Jamaco River Run?
- Saturday, June 20, 2026 in Merrimac, MA at Waterhouse Field, Merrimac, MA. Check the official event page for exact start times and wave schedules.
- How do I register for the Jamaco River Run?
- Registration is handled through their official registration page. Confirm pricing, distances available, and sign up there.
Jamaco River Run
Jun 20, 2026