Mary-Lou Butterfield

CanadaCanadaActive
Events
Half Marathon

Mary-Lou Butterfield is a Canada long-distance runner. She competes primarily in the Semi and Marathon.

Her personal bests include 1:23:33 in the Semi and 3:09:37 in the Marathon. She is currently active on the international athletics circuit, representing Canada.

Personal best · Half Marathon1:23:33
2025 season best1:26:09Nov 23, 2025
2025 season best
Last competitionAACR Philadelphia Half MarathonNov 23, 2025 · 1:26:09
AACR Philadelphia Half Marathon

As of Nov 13, 2026: Half Marathon 1:23:33, 2025 season best 1:26:09 (Nov 23, 2025) · Last competition: AACR Philadelphia Half Marathon, Nov 23, 2025, 1:26:09

Personal bests

WA points calculator →
DisciplineResultAll-time
SemiToronto 2011Canada Half Marathon all-time list1:23:33869 pts–
MarathonOttawa 2012Canada Marathon all-time list3:09:37779 pts–

Progression

SeasonDisciplineResultWindDateCompetitions
2025Semi 1:26:09–Nov 23, 2025AACR Philadelphia Half Marathon
2012Semi 1:23:45–Apr 29, 2012–
2012Marathon 3:09:37–May 27, 2012–
2011Semi 1:23:33–Oct 16, 2011–
2010Semi 1:24:58–Sep 5, 2010–
FAQ

Frequently asked questions

Mary-Lou Butterfield's Half Marathon personal best is 1:23:33, set on Oct 16, 2011 in Toronto (CAN).

Mary-Lou Butterfield competes in the Half Marathon.

2025 season best: 1:26:09, set on Nov 23, 2025. Last competition: AACR Philadelphia Half Marathon on Nov 23, 2025, 1:26:09.