If you were out and about shopping this weekend, you may have noticed a peculiar sight in Back Bay. On Saturday, dozens of Bostonians took to the streets wearing nothing but their Santa hats, underwear and jogging shoes. Saturday marked the 13th Annual Santa Speedo Run, in which Santa wannabes completed a one-mile race in their skivvies to raise money for charity. Aside from being a hilarious holiday tradition in the Hub, Santa Speedo Run participants raised more than $260,000 for the Play Ball Foundation, a local Boston charity that builds children’s character through sports. Our photo intern, Grace Donnelly, was on the scene at the Santa Speedo Run on Saturday to snap photos of shenanigans and holiday cheer that only Santas in their underwear can deliver. Check out the photos below!

Photos of the 2012 Santa Speedo Run

Each December, the Santa Speedo Run takes half-naked Bostonians through Back Bay’s shopping district, starting at Lir Tavern and circling a one-mile loop down Boylston and Newbury Streets. It takes about 30 minutes for all runners to complete the loop, with passerby gaping at the scantily-clad Santas running in the cold. After the run, participants head inside to warm up at bars along Boylston Street, donating $5 to share in the holiday cheer with other nearly naked Santas.

Hatched in 2000 by five friends, the Santa Speedo Run has been an enduring tradition through one of Boston’s most prestigious neighborhoods for over a decade. After met with positive responses when it was first hatched, the Santa Speedo Run creators realized they could “leverage the enthusiasm from the event for a good cause.” To date, the Santa Speedo Run has raised over $1 million for various local charities over the years.

So, when you consider giving your money to charity during the holidays next season, consider stripping down as well. After all, it’s for a good cause.