Marfabr/Presidio County, Texasbr/30 18.615' N 104 00.341' Wbr/Directions: Start at the intersection of SH-90 and Spring Street. Go .65 miles east on SH-90. The marker is on the left (north) side of the road.br/ br/Text: Formed from Bexar County created January 3, 1850, organized March 13, 1875. So named for the early quot;Fortress garrisoned by soldiers.quot; Erected for the protection of the Big Bend missions. County seat Fort Davis, 1875, Marfa, since 1885.