Oisin Ó Gailín broke the Finn Valley AC 1500m record at the weekend.
The Ballybofey man was competing at the Fresno State Invitational in the United States.
In Fresno, California, Oisín finished in 3:45.30, breaking his own 3:46.39 mark set at Nashville in 2019.
Subscribe or register today to discover more from DonegalLive.ie
Buy the e-paper of the Donegal Democrat, Donegal People's Press, Donegal Post and Inish Times here for instant access to Donegal's premier news titles.
Keep up with the latest news from Donegal with our daily newsletter featuring the most important stories of the day delivered to your inbox every evening at 5pm.