The logo is from Skin Industries, a “Sports Fashion” company. The sticker is akin to the iconic “mud flap girl” silhouette that’s often seen adorning the flaps of tractor-trailers.

Dirty Girl runners, such as these at an event in Texas, face mud pits, ... is one of the more than 1,000 women who paid $100 and signed up for today's Dirty Girl Mud Run in Dade City.

TODAY’s Sara Haines tries her hand at the Dirty Girl run in Chicago, a women-only 5k obstacle course filled with crazy costumes, girl power, and lots and lots of mud.