The Cottonwood Springs Pony Express station site, may have been on the east side of Cottonwood Creek where a monument stood as late as 1960. The station, also known as McDonald's Ranch, served previously as a stop for the Leavenworth and Pike's Peak Express Company stage line as well.  Most sources do not dispute the identity of Cottonwood Springs as a station.  In 1864, Eugene F. Ware described a two-story log structure at Cottonwood Springs, which could have served as the site of Cottonwood Station.  Mattes and Henderson suggest the building described by Ware possibly served as the Pony Express station, and might be the same building moved from the Upper 96 Ranch to the Gothenburg City Park in 1931.

http://www.nps.gov/parkhistory/online_books/poex/hrs/hrs5a.htm#34