Chicago Half Marathon happened on 2011-09-11.
Chicago Marathon was created in 1977.
Lisbon Half Marathon was created in 1991.
Egmond Half Marathon was created in 1973.
Porto Half Marathon was created in 1997.
Granollers Half Marathon was created in 1987.
Sapporo Half Marathon was created in 1958.
Portugal Half Marathon was created in 2000.
Budapest Half Marathon was created in 1984.
Lille Half Marathon was created in 1986.
Bogotá Half Marathon was created in 2000.
Paris Half Marathon was created in 1993.