The James Griffin Br. Leo 5K is an annual road race held in Tullow, Co. Carlow, taking place on a Sunday morning in May. The event is a run and walk open to all abilities and is timed by JustRuns Events. The course uses the quiet roads in and around the market town of Tullow on the River Slaney, which is the largest town in Co. Carlow. The race commemorates James Griffin and Brother Leo, and draws both club runners and community participants. With early bird entry available at €10 and chip timing provided, the race is a well-organised local fixture on the Leinster spring calendar. The course profile is generally flat, reflecting Tullow's low-lying riverside setting in the south-east midlands.