Divisadero Natural History Walk

A long dune field blew across the city. The ice age was over. Alamo Square Park is an outcrop of rock (one of many) jutting up through the vast dune field. Like all of our bedrock, water springs up through the fissures, even at hilltops. We'll explore places that were once lakes along Divisadero, springs along Fulton and ridges along Hayes. Those things happened since the Gold Rush, but we'll look back farther, too. Highlights include rehabbing park irrigation, San Souci Road House, shanks' mare to the Presidio, Hebrew orphans, Hayes Creek, Hayes dune, old maps, fog & wind, and viewpoint misspellings. This, the shortest Thinkwalk we offer, will have a long-lasting effect on the way you view the city. You'll start seeing things! (like the underlying landscapes!)