Located 12 miles from Quaking Aspen Station on the Bear River. Bear River Station was the last station in Wyoming with the next station to the west, Needle Rock Station, Utah.

http://www.expeditionutah.com/featured-trails/pony-express-trail/wyoming-pony-express-stations/

Though the U.S. mail contract and several other sources identify Bear River as the next station, the exact location of this site is currently unknown.  According to the Settles, a Mormon named Myers managed station operations there.  Bear River Station was the last Pony Express station within the state of Wyoming.

http://www.nps.gov/parkhistory/online_books/poex/hrs/hrs6a.htm#95