The Dublin Marathon is an annual 26.2 mile road marathon in Dublin, Ireland, held on the last Sunday in October. Prior to 2016, the race took place on the last Monday in October, which is a public holiday in Ireland. Held each year since 1980, the marathon had a record 22,500 registrants for the 2019 race, including over 5,000 entrants from outside Ireland.

Trudi Thomson is a British former distance runner and ultramarathon runner who competed for Great Britain at the IAU 100 km World Championships in 1993 and 1994, the IAAF 1995 World Cup Marathon, the IAAF 1995 World Championships Marathon and the IAAF 1995 World Championships Half Marathon. She represented Scotland at the 1999 World Mountain Running Trophy.