Auburn is a small city in Placer County on Interstate 80. Nearby the confluence of the North and East Forks of the American River are a good place to swim and drink beer. There is a picturesque old town neighborhood near the statue of a miner just off the freeway. Under the miner, there are large drainage tunnels filled with graffiti that one can explore with a flashlight.
The nearest commercial airport is in Sacramento, approximately thirty miles away. Auburn does have a private airport as well. Amtrak services downtown Auburn, and Greyhound has a stop in nearby Colfax. Interstate 80 runs right through both towns.
Placer County Transit does operate buses in part of Auburn, but service is limited and does not run on Sundays. It's best to rent a car.
Auburn is known to be the "Endurance Capital of the World", as many races either start or end here. Notably, the Western States Endurance Run ends at Placer High School in Auburn. There are hundreds of miles of trails (including the Western States Trail) that lead to or from here.