Portland Marathon was created in 1972.
The Portland Marathon is an annual marathon sporting event held in the city of Portland, Oregon. It was first held in 1972 and has been held every year since.
New York City Marathon was created in 1970.
Frankfurt Marathon was created in 1981.
Cardiff Marathon was created in 1981.
Nagoya Marathon was created in 1984.
Gusher Marathon was created in 2010.
Rotterdam Marathon was created in 1981.
Checker Marathon was created in 1961.
Oslo Marathon was created in 2004.
Ferrara Marathon was created in 1979.
Turin Marathon was created in 1987.
Ljubljana Marathon was created in 1996.