For who knows how long, the block Filbert Street between Leavenworth and Hyde has been heralded as one of the city’s two steepest streets, tied with 22nd between Church and Vicksburg at a 31.5% grade. 
Teetering over the edge of hill, looking out at Coit Tower, most would not venture to dispute this claim. But blogger Weather Sealed hopped in his coach and took San Francisco’s steep hills for a test drive. In conclusion, he found that preeminent block of Filbert to have the fourth steepest grade, with Prentiss between Chapman and Powhattan taking the cake at a 37% grade. “Thank you so much for this opportunity,” said Filbert, with an air kiss.
