Marian Geraghty Memorial Race. This race takes place on the first Sunday in July in Mountbolus County Offaly less than 10 Miles from Tullamore. This year the date of the race is Sunday 4th of July. Registration takes place from 10am with the race beginning at 11.30am. The race is is a 10km road race over a tough undulating course which is nice tester for those intending to run further over the year.