Grand Summit, Kansas
Grand Summit is an unincorporated community in Cowley County, Kansas, United States. History. A post office was opened in Grand Summit in 1882, and remained in operation until it was discontinued in 1933. Grand Summit was a shipping point on the Atchison, Topeka and Santa Fe Railway. According to the 1910 Census, Grand Summit contained 52 inhabitants. Education. The community is served by Central USD 462 public school district.