Marathon Map
Marathon is a census-designated place (CDP) in Brewster County, Texas, United States. The population was 470 in 2007, after growing from 455 in 2000, but had decreased to 430 by 2010.
Marathon is located at 30°12?27?N 103°14?36?W / 30.2075°N 103.24333°W / 30.2075; -103.24333 (30.207529, -103.243258).
According to the United States Census Bureau, the CDP has a total area of 5.2 square miles (13.6 km²), all of it land.