Several notable sources identify Michael Martin's as a station, including Gregory Franzwa, who places it on his Oregon Trail maps as approximately ten or so miles southwest of Green River Station. Michael Martin, a French-Canadian, managed station operations at his trading post, where he sold a wide variety of items.  Richard Burton mentions that Michael Martin had a store there, and that in 1860 his stage stopped there for a short rest, making it highly likely that the Pony Express stopped there.  However, Bishop and Henderson point out that the 1861 U. S. mail contract did not identify it as a station, indicating it may have been eliminated as a station by March 1861. http://www.nps.gov/parkhistory/online_books/poex/hrs/hrs6a.htm#88