From SFBC:
NOTE: DATE CHANGE (WAS 26th) This ride will go north to explore the old Italian food industries, before turning south to explore the multiple food histories of the Mission and with luck, making it to Alemany Farm for the final stop, with special food stops along the way. Bring a snack and water, and reserve your spot: 415-608-9035, sliding scale $15-50, benefiting Shaping San Francisco