Volcano in the East Bay Hills ~ Sunday, September 17, 2017

While Wini worked at Chabot last saturday, Nate and I explored the nearby Sibley Volcanic Preserve.

This is a nice short hike in the Oakland Hills that takes you to a long-dormant volcano, whose plug was once excavated as a quarry, allowing you to walk right into the heart of the mountain. And right in the middle, someone has made a maze out of rocks.

We also saw a lot of wildlife on the way: a mouse, dozens of lizards, and small and very fast snake I couldn't get a picture of, but which was probably an "alameda whipsnake".

This is very close to the Sacramento Northern tunnel, which I will have another entry about some day.