Michael and Ella Dickinson are dressed as robber and cop. PHOTO/JOHN CARDILLO

Hopkinton sixth-grader Finn Clancy, wearing a Jaylen Brown Celtics uniform, crosses the finish line. PHOTO/JOHN CARDILLO

Bryanne Wainford is all skin and bones as she finishes the race. PHOTO/JOHN CARDILLO

Participants show off their costumes. PHOTO/JOHN CARDILLO

Runners head out at the start of the 5K. PHOTO/JOHN CARDILLO

Children compete in the Wee Wicked Dash. PHOTO/JOHN CARDILLO

Children display their costumes. PHOTO/JOHN CARDILLO

Children display their costumes. PHOTO/JOHN CARDILLO

Participants chat before the race. PHOTO/JOHN CARDILLO