Season
Personal Records Personal Records
Event Mark New York City Metro State National Date
300m 48.68 #21,215 Feb 4, 2026
400m 1:04.92 — May 7, 2026
600m 1:53.13 #8,320 Feb 4, 2026
800m 2:34.22 — May 7, 2026
1000m 4:02.58 #12,667 Dec 3, 2025
300m 48.68 #21,215 Feb 4, 2026
600m 1:53.13 #8,320 Feb 4, 2026
1000m 4:02.58 #12,667 Dec 3, 2025
400m 1:04.92 — May 7, 2026
800m 2:34.22 — May 7, 2026
Long Jump 14-6.25 — May 7, 2026
See where William ranks Metro, State & National rankings, available to MileSplit PRO subscribers. Join MileSplit PRO
Results Results
PRO

See all 21 of William Mackler’s results

Full performance history, included with MileSplit PRO.

Subscribe to view results

2026 - Outdoor

400 Meter Dash

800 Meter Run

Long Jump

2026 - Indoor

300 Meter Dash

600 Meter Run

1000 Meter Run

2025 - Outdoor

400 Meter Dash

800 Meter Run

College Progression Tracker

Your 1600m performance is better than XX% of Division I athletes when they were Senior in high school.