Some icons were provided by the LED24 Icons Set under the Creative Commons Attribution-Share Alike 3.0 license.
Additional photos contributed by:
"Bike on train tracks", photo by Jonathan Maus Expressed permission, all rights reserved.
"Mountain bikers at Coyote Wall" and other photos by Tomas Quinones Expressed premission, all rights reserved.
"Portland Velo, Club Riders" by Kevin Rhea Expressed permission, all rights reserved.