Race / XC
The Six Sigma 60 brings long-format mountain bike racing to Six Sigma Ranch & Winery in Middletown, California, on Sunday, November 22, 2026. Built around a 15-mile loop, the event offers 30- and 60-mile solo races, a 60-mile Duo Relay, and a dedicated Gravel category.
The course combines fast and flowy singletrack, fire road, short punchy climbs, recovery sections, plenty of shade, and three creek crossings. New trail connections were developed specifically for the event, and roughly half of the course uses terrain that has never been raced before. The Six Sigma 60 is all-weather racing.
Free onsite camping is included with registration, and the winery will be open during race weekend, making it easy to turn the event into a full weekend at the ranch.
Six Sigma 60 is part of the 2026 California MTB Endurance Series and carries double series points. Series champions earn the 2026 Champion Jersey, while the overall Elite Men’s and Elite Women’s champions will each receive a top-of-the-line FOX Fork.
