UPDATED, July 19: The 39th Pan-Mass Challenge, a fund-raising bikeathon to fight cancer, rolled Aug. 4 and 5.

At least three Arlington public-safety officers are riding, as they did last year. They are:

-- Richard Gallagher, a firefighter at Highland Station;

-- Michael Hogan, a K-9 police officer; and

-- Dennis Mahoney, a police officer.

Find out more about each -- and support them, if you wish -- by clicking the link after each name.

As many as 50 Arlington residents are reported to be involved in this effort. If you know about others, please use this form to tell the publisher. Include the link to the person's profile, and it will be added to this appeal. That includes:

-- John Kohl, who is participating in his 22nd ride.

-- Ted Rogers, riding for his mom, who passed away this spring.

The Pan-Mass Challenge says it raises more money for charity than any other single athletic fund-raising event in the country. Benefiting the Dana-Farber Cancer Institute, the effort pioneered the $4 billion athletic fund-raising industry after it was founded in 1980.

Dana-Farber’s largest single contributor gave a record gift of $51 million in 2017. The PMC runs through 46 towns across Massachusetts. More than 6,200 cyclists from ages 15 to 84 rode in 2017, choosing from 12 routes.

Six two-day routes range from 132 to 192 miles, and six one-day rides range from 25 to 110 miles. Cyclists are required to raise between $600 and $8,000 to ride in the PMC, depending on the chosen route. The three starting lines are in Sturbridge, Wellesley and Bourne, and five finish lines in Provincetown, where there are two; Bourne, Wellesley and Foxborough.

This news summary was published Sunday, July 15, 2018, and updated July 19.