The Highway
236 loop is one of my favorite drives beginning in Boulder Creek
and winding through Big Basin State Park to intersect with scenic
Highway 9 and then back again to Boulder Creek.
While driving this loop you pass through several ecosystems most of
which are determined by slope, aspect and rock type.
You'll travel from the redwood forests that make up so much of the
San Lorenzo Valley, through outcroppings of shale and Butano
sandstone with its manzanita and knobcone pines, to tan oak
woodlands.
The cache is located at a spot popular with geologists, an
outcropping of Twobar shale in which tiny circular fish scale
fossils can be found.
From the cache
site you can see the old road and understand why it's no longer
being used!