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There are three courses to choose from, of varying lengths. The shortest is the 17.5-mile "Fun Course," which follows Pass Road through the middle of the Buttes and returns along the south edge of the Buttes. The 40-mile "Classic Course" is the original course, which also follows Pass Road through the Buttes but then continues north around the Buttes. The 100-mile "Century Course" follows the 40-mile course but continues along the Sacramento River and passes through Meridian. It is one of the flattest 100-mile courses in California, and is supposedly 95% flat terrain.