With only one set of equipment, the train left each terminal six times a month.

(In April 1935 the fastest train took 59 hr 20 min Chicago to Portland.

)[1] The M-10001 was withdrawn in March 1938 and replaced with another articulated trainset, the former City of Los Angeles M-10002.

The train was discontinued May 1, 1971, with the takeover of Union Pacific's passenger services by Amtrak.

The dome dining cars were unique to Union Pacific and were only operated on this train and the City of Los Angeles.