The organisers also stage Northern Ireland's largest half marathon event, which takes place annually in September.

[citation needed] The Belfast City Marathon is an AIMS certified race.

[6] The race traditionally starts at Stormont Estate at 9am and finishes in Ormeau Park.

[3] Following this event, organisers apologised after it was noted that the course was 0.3 miles longer than the typical marathon standard.

[12][13] Previously sponsored by Deep River Rock,[14] the 2022 event (scheduled for May 2022) was reported to be Mash Direct.