The Dirty Dozen bike race was co-founded by Danny Chew in 1983 and takes on the steepest hills in Pittsburgh. This year's race includes riding up 13 hills — aka a dirty dozen — with hill grades from 20 to 37 percent. Same day registration runs from 8 to 8:45 a.m.
Where: Bud Harris Cycling Track at 1401 Washington Blvd. (Highland Park)
When: November 25, 2017 at 9:00 a.m.
How much: $45 for non-competitors | $50 for competitors