Set for its 40th annual running along the dirt fire trails of Chabot Regional Park in Castro Valley, Calif., the Lake Chabot Trail Challenge Half Marathon & 5K race offers a rugged, challenging course for runners, with plenty of hills along a loop course throughout the park.
The race takes place just a short drive from the nearby cities of Oakland and San Leandro in the Bay Area, along the lake’s 20 miles of hiking trails — which connect to another 70 miles of trails in nearby Anthony Chabot Regional Park.