Lace up for this scenic Castro Valley trail event featuring both a half marathon and 5K! The half marathon starts at 8am with a challenging hilly dirt loop showcasing beautiful ridge views of Lake Chabot, Mt. Diablo, and San Francisco Bay (with a 3.5-hour cutoff), while the 5K begins at 8:30am on a mostly paved out-and-back route with gentle rolling hills. Early registration by June 6th costs $40 for the 5K and $65 for the half marathon, with those signing up by May 10th earning a guaranteed t-shirt.