Marysville is serviced by a daily local out-and-back train originating from the Sacramento Old Town Yard, and occasionally a turn from Los Angeles, usually with 13 setouts and 13 pickups, and a caboose.  14 industries have a total of 40 spots. Some rookie operators have gotten stuck in this town for hours due to the many required runarounds and switchbacks.  Originally this area was hidden staging, then was expanded to accommodate an operator who had a bad back, and needed to roll back and forth on a chair when operating.  Marysville now is often requested by experienced operators.

During 4 interchange operation, this area is the responsibility of the Western Pacific.  Those WP employees who are updating their resumes and attempting to get on at the LS&I are anxious to be able to list experience at Marysville as a qualifying factor. Unfortunately for many, their error rate is published by Dr. Smith.