Check out these Colorado Bikes images:
Fixed-gear IRO Commuter – 2010
Image by vicandwilliam
My fixed-gear commuter rig as of January 2010 on a foggy and cold morning ride.
Image by Cathy andersen
Ironman held in Boulder, Co, August 3, 2014. Picture taken with about a mile or so to go on the bike portion. (around Folsom and Iris)