Located 14 miles from Willow Springs Station and 12 miles from Sweetwater Pony Express Station on east bank of Horse Creek and just north of the old Emigrant Road.  http://www.expeditionutah.com/featured-trails/pony-express-trail/wyoming-pony-express-stations/

Several sources list Horse Creek as a station, including the 1861 Overland Mail Company contract.  Gregory Franzwa specifically identifies Horse Creek as a Pony Express station in his Oregon Trail maps.  Little more is known about this station site.  

http://www.nps.gov/parkhistory/online_books/poex/hrs/hrs6a.htm#71