More than 500 bikes rode into town on Sept. 20 for the 13th annual Rick Graham Diabetes Awareness Memorial Ride.

The ride is held in memory of former Boston firefighter Rick Graham who suffered a diabetic coma while riding his motorcycle.

The ride began at the Boston Firefighters Union Hall and bikers rode 50 miles through backroads from Dorcester to Onset. Concluding at the Dudley L. Brown VFW post in Onset, bikers and other supporters were treated to an afternoon of food and fun in the sun.

Half of the money raised will be donated to the American Diabetes Association and the other half will go to helping former bikers’ families.