Black Hills Trail.
Three bedrock mortars, a possible PCN, and a slick.
Elevation 1520 ft.
Pecked curvilinear nucleated petroglyphs are not supposed to occur in Contra Costa County.
We’re not so sure.
Warning: count(): Parameter must be an array or an object that implements Countable in /srv/users/serverpilot/apps/nativesites/public/wp-includes/class-wp-comment-query.php on line 399