Get out and ride your bike this fall! Join the University of Iowa Fall Bike Challenge Sept. 13 to Oct. 11 and post your pics on Instagram of your bike commute and rides. You can compete in three categories, commuter, recreational and group. Use the hashtag #fallbikechallenge2015 along with #UIcommuter, #UIrecbike, or #(team name) and win random weekly prizes and overall prizes of bike accessories and gear. 

Submit your photos anytime during the challenge.Two weekly random prize winners will be selected on Mondays from the previous week and notified via Instagram message. 

Make sure to follow the Office of Sustainability on Instagram for challenge updates at:  uiowasustainability. Not on Instagram? Sign up here-it's easy and a fun way to share pics. Set your Instagram account setting to public so we can see your posts.