grizz.org/routes/detail.php?id=203
A lollipop route from Pinole Park to Martinez via Alhambra Valley. Over Pig Farm, then Franklin Canyon to Cummings Skyway and down Crockett Blvd to an optional stop in Crockett Hills Park. Carquinez Scenic Drive and the George Miller Trail to Martinez. Return via Alhambra Valley.