Lombard Street is an east–west street in San Francisco, California that is famous for a steep, one-block section with eight hairpin turns. Stretching from The Presidio east to The Embarcadero most of the street's western segment is a major thoroughfare designated as part of U.S. Route 101. The famous one-block section, claimed as "the most crooked street in the world", is located along the eastern segment in the Russian Hill neighborhood. The street was named after Lombard Street in Philadelphia by San Francisco surveyor Jasper O'Farrell.