22nd Street (San Francisco)
22nd Street is an east–west street passing through the  Noe Valley, Mission, and Potrero Hill districts of San Francisco, California. The street is discontinuous and exists in several sections: the main western section between Hoffman Avenue and the Bayshore Freeway, a segment from Vermont Street to Wisconsin Street, a short alley off of Missouri Street, and an eastern section from Texas Street to Pier 70. Below the elevated Interstate 280 and at-grade eastern section lies 22nd Street station, Caltrain's only station beneath ground level.

Steepness
It is one of the steepest streets in the city. In the 250-foot block from Vicksburg to Church Streets in the Noe Valley neighborhood, the city map shows a 79-foot descent along the south side of the street ( along the north side) for an average grade of just over 31%, about the same as the steepest block of Filbert Street in San Francisco. (Both streets are one-way down; bottom of the 22nd St hill at  A 1956 view seems to show a two-way street.)

See also 
 22nd Street (Caltrain station)
 Baldwin Street, Dunedin — the world's steepest residential street.

References 

Streets in San Francisco
Mission District, San Francisco
Potrero Hill, San Francisco