From the website-"IT'S PITTSBURGH,"I wanted to showcase the hills."January 26, 2011It's a one-day bicycle ride around Pittsburgh. It covers 13 very steep hills. It's a test of strength, endurance, biking skills and human perseverence. It's called the DIRTY DOZEN. It was started in 1983 by Danny Chew, his brother and some of their friends. It's … Continue reading Pittsburgh Dirty Dozen