TWO "OAKS" 1) Blue oaks are clever trees, uniquely adapted to California's dry summers. 2) Poison oak (not an oak at all) is the state's most common shrub. We all get one free exposure, and then the trouble begins . . .

Part of a series about an easy stroll along a creek on Mount Diablo's lush north side, led by Sue Donecker, Ken Lavin, Rich McDrew, Jim Mitchell, and Yulan Tong. Presented by Mount Diablo Interpretive Association.

First published in 2012, revised in 2017. Music from Banks of the River by Phil Heywood. Photos by Scott Hein (and others mentioned in closing credits) Narration and production by Joan Hamilton.