Measure, Cut, Ruffle, Sew! DIY Running Skirt :)
Patriotic Running Costume for the Patriot's Challenge at the Run for the Dream Half Marathon in Williamsburg, VA
Custom color EL-wire glowing tutu. These would be so fun in a night race!
RunDisney Costumes by mamaspartydress on Polyvore featuring NIKE, Asics, Disney, New Balance, Saucony, Puma, Vibram FiveFingers, 2XU, Yazbukey and adidas
"Pirate Running Costume" by angela-holder on Polyvore featuring Barneys New York, New Balance, Suunto and NIKE
Disney Running Costumes | Sparkle Athletic
A Great and Easy DIY Wonder Woman Costume -- Plus this site has other fun/easy costumes
Cookie Monster running costume for the chocolate 10k.
By far... Best running costume ever! Mr. Walt Disney & Mickey!