The International Women's Flat Track Derby Association Championships are the leading competition for roller derby leagues.
2015 MVP Scald Eagle of the Rose City Rollers with the Hydra Trophy after the 2015 WFTDA Championships
Roller derby is a roller skating contact sport played on an oval track by two teams of five skaters. It is played by approximately 1,250 amateur leagues worldwide, mostly in the United States.
A roller derby scrimmage in Utah (2012)
A Charm City All Stars (Baltimore, Maryland) blocker vs. a Rhode Island Riveter (Providence, Rhode Island) jammer (2008)
Two jammers (from the Oly Rollers and Rainy City) race from the jammer line (2011)
Lonestar Rollergirls in Austin, Texas, play on a banked track (2011). The jammer (wearing the starred helmet cover) is trying to pass a pivot (wearing a striped cover) with various blockers assisting.