Weather Underground: Marathon, Iowa - Active advisories, if any. Current conditions, five-day forecast, local radar and satellite. - http://www.wunderground.com/US/IA/Marathon.html
City-Data.com: Marathon, Iowa - Profiles housing, population demographics, jobs, weather and climate tables. Contains a list of area hospitals, schools, airports, radio and TV broadcast stations, charts and maps. - http://www.city-data.com/city/Marathon-Iowa.html
Wikipedia: Marathon, Iowa - Encyclopedia article presents geography and demographics of this community in Buena Vista County. - http://en.wikipedia.org/wiki/Marathon,_Iowa