Shaping San Francisco Bicycle History Tour: Ecological History (South)

From SFBC:

This trip through San Francisco's lost sand dunes, ponds, creeks and coastline will focus on the city south of downtown and SOMA, traversing the Mission, Mission Bay, Potrero Hill, Bayview, and the southeast coastline, including several new public parks. Sliding scale $15-50, benefitting Shaping San Francisco. For more info:415.608.9035