PMC Bolton Kids Ride. Emerson and Florence Sawyer School grounds. 100 Mechanic Street. Bolton. 11:00 a.m. Tricycle/bike-riding on three routes to raise money for the Pan-Mass Challenge supporting cancer research at Dana Farber Cancer Institute through The Jimmy Fund. Ages 2 -14. $10 registration fee, $25 fundraising minimum. https://kids.pmc.org, Kristen@keaneville.com