Prairie Gate/Eight Mile Station (N39 58 15.6 W114 04 33.1)  http://www.expeditionutah.com/featured-trails/pony-express-trail/nevada-pony-express-stations/ 

PRAIRIE GATE/EIGHT MILE STATION

Several notable sources list Prairie Gate or Eight Mile Station as a Pony Express station, even though it was not listed on the 1861 mail contract station, and its exact location remains unknown.  The station possibly existed on the present-day Goshute Indian Reservation,  and/or it may have been at Eight-Mile Springs, so-called because of its distance to Deep Creek.  It is thought that this station was probably erected after July of 1861 and was part of the Pony Express route for approximately three months.

http://www.nps.gov/parkhistory/online_books/poex/hrs/hrs7b.htm#124

Prairie Gate Station  The final Nevada station (or first for westbound riders) was built a couple months after the trail opened to break up the long ride between Utah’s westernmost station, Deep Creek, to Antelope Springs in Nevada. The premature end of Antelope Springs also made Prairie Gate an integral stop. The station was also referred to as Eight Mile Station.  http://www.nevadamagazine.com