This site is probably located one and one-half miles southeast of Ovid, in Sedgwick County, Colorado. Sources generally agree on the location of the Julesburg Station site and its identity as a Pony Express and stage station.  On the L. & P.P. Express Co. station list, it was probably called Upper Crossing, South Platte or Morrell's Crossing. In 1859, Jules Reni established a trading post at the site and served as stationkeeper for the Pike's Peak stage line and the Pony Express.  At Julesburg, Pony Express riders and stages crossed the South Platte and took the California Road/Overland Trail to Lodgepole Creek.

http://www.nps.gov/parkhistory/online_books/poex/hrs/hrs5b.htm#43