Marathonbr/Brewster County, Texasbr/30 09.197' N 103 17.260' Wbr/Directions: Start at the intersection of Post Ranch Road and Avenue D. Go .5 miles south on Avenue D. The marker is on the left (east) side of the road.br/ br/Text: Established in 1880 as a means of preventing Indian raids into Mexico. Raided by Apaches in 1881. Abandoned in 1893 after Western Texas had been permanently cleared of Indians.