It's the nation's top athletic fundraising event, so it's no wonder the likes of Senator John Kerry and Lance Armstrong came out to support the annual Pan-Massachusetts Challenge.
Since 2007, the bike-a-thon, presented by the Boston Red Sox Foundation and New Balance, has donated 100 percent of the money raised by riders to help fund the Dana-Farber Cancer Institute. Since the fundraiser began in 1980, it has raised an impressive $303 million.
The bike ride ran through 46 towns across Massachusetts, consisting of various routes designed for different skill levels. For this year's event, riders were asked to raise anywhere from $500 to $4,200 depending on which route they chose to ride.
Watch the video above to see the cyclists in action and to hear from Senator Kerry and NESN's Jack Edwards.