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The Dirty Dozen was established in 1983 by siblings Tom and Danny Chew, with the goal of showcasing the most challenging approximately 12 climbs (though the number has fluctuated between 12 and 15 over the years) in the Pittsburgh area. The selection of climbs can vary, and you can find the 2023 list of climbs on this page. For additional information, be sure to check out PJAMM's dedicated Dirty Dozen Climb Page as well. This race is held the last Saturday in October.
The Dirty Dozen climbs can be viewed on this page via the map (zoom in to view climbs in particular areas), by Climb Cards (photo and stats), or by a detailed list that can be arranged in metric or imperial units by difficulty, distance (longest climbs in the area), altitude gained, highest elevation (highest summit), average grade (sort by varying distances), lowest start point, etc. Visit the Climb Page to see details and photos for that particular bike climb.
The Top 10 Dirty Dozen by Fiets Index 1. Dirty Dozen #11 - Welsh Way, 2. Dirty Dozen #6 - Rialto St. , 3. Dirty Dozen #5 - Logan St., 4. Dirty Dozen #3 - Berry Hill Rd, 5. Dirty Dozen #7 - Suffolk St. , 6. Dirty Dozen #12 - Barry St, 7. Dirty Dozen #9 - Canton Ave, 8. Dirty Dozen #8 - Sycamore Street, 9. Dirty Dozen #13 - Flowers Ave, and 10. Dirty Dozen #2 - Ravine St
1 - 25
26 - 50
51 - 75
76 - 100
over 100
Gravel
We've partnered with Sherpa-Map.com to bring you the best route planning tool. With Sherpa Map you can plan your route up a PJAMM climb or use their route generator and custom map styles to plot your next big ride. 