The 10th annual March Fourth 5K & Dog Walk is Sunday, March 7, 2027 at South Mountain Reservation in Millburn, NJ, near Brookside Drive and Glen Avenue.

The timed and untimed 5K both start at 9:00am. The dog walk starts at 10:00am. It's a separate, relaxed community walk for people and their dogs, so you don't have to run to bring your pup. Dogs showing signs of fear, stress, or aggression may be asked to leave, and the organizers will post event-day pet guidelines before race day.

Registration covers the untimed 5K and/or the dog walk: $38, or $33 early bird. The timed 5K with an optional dog walk is $45 ($40 early bird). 2027 registration runs through the Colorectal Cancer Alliance event page linked from marchfourth.org. Parking and arrival instructions go out to registered participants before event day.

March Fourth started in memory of the organizers' mom, who died of colon cancer on March 4, 2016. It has raised more than $450,000 for the Colorectal Cancer Alliance and draws 750+ participants each year. Details: marchfourth.org

South Mountain Reservation (Brookside Dr & Glen Ave)

Upcoming pet events here

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March Fourth 5K & Dog Walk 2027 (10th Annual), Millburn NJ