JONATHAN KALCZYNSKI

3 races in the archive

Personal bests

10K

52:39

2023 · 8:28 /mi

Progression

10K3 finishes · best 52:39 in 2023 · latest 1:00:36 in 2025
54:1058:202015202320252015 10K — 53:392023 10K — 52:3952:392025 10K — 1:00:36

Lower on the chart is faster — a line falling to the right means improvement.

10K — pace by segment2 of 2 editions shown
8:209:1010:00Start–5K5K–Finish2025 · Start to 5K · 9:47 /mi2025 · 5K to Finish · 9:43 /mi20252023 · Start to 5K · 8:17 /mi2023 · 5K to Finish · 8:40 /mi2023

Minutes per mile over each stretch of the course. Lower is faster, so a line rising to the right means slowing down. Colour runs pale for the earliest editions to dark for the most recent; tap a year to show or hide it.

Race history