The July 23, 2016 Bad Bass Half Marathon in Castro Valley, CA is put on by Brazen Racing. The scenic course around Lake Chabot is a combination of paved trails and fire trails, and does have some gentle rollers. The race is somewhat of a smaller no frills race, but does have medals & shirts for all participants. For more information, visit the California half marathons page, and view under July half marathons for direct link.
California half marathons 2016