Cold weather didn't deter serious and casual athletes alike from the annual Santas on the Loose run on Saturday, Dec. 3.  The event featured a 5K run and a one-mile "fun run," both starting from the Webster Groves Public Library.

Runners donned their seasonal Santa gear to stave off cold and celebrate the holiday season.

Check out scenes from the event in the gallery below!

Photos by Max Bouvatte.