Runners will make their way around the trails and park roads around the Los Vaqueros Reservoir at Brazen Racing’s Tarantula Run Half Marathon, which starts and finishes at the Kellogg Creek Picnic Area. From there, the race follows what is roughly a clockwise loop along the trails of the Contra Costa Watershed, and is held during the time of year when the tarantulas native to this area are roaming in search of mates.
(MORE: Los Vaqueros Tarantula Run Half Marathon event details)