22nd Street (San Francisco)

22nd Street in San Francisco, California is one of the steepest streets in the world. It has a maximum gradient of 1:1853, or 31%. Along with Filbert street, also in San Francisco, which has the same maximum gradient, the two streets are thought to be the steepest streets in the Western Hemisphere. Baldwin Street in Dunedin, New Zealand is steeper, with a maximum gradient of 1:2.86â€"38%.

References

*adventurecycling.org
*ourshop.co.nz