Located in Placer County is Auburn, California with a population of more than about 13,000 residents. Auburn is a small affluent city very well known for its history during the California Gold Rush and for being home to several famous poets and writers. Auburn is known for being the ?Endurance Capital of the World,” which includes events such as Western States Endurance Run, Western States Trial Ride, American River 50 Mile Endurance Run as well as many others.