Johnson Power Rankings
The world authority on 200+ mile ultramarathon running — weekly, data-driven, course-difficulty-adjusted.

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Michael Kershen

Men · Americas · provisional rating

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
ContinuousMen1,416262• new
OverallMen1,416262• new

Why this rank

The Overall rating is the time-decayed mean of this athlete’s best 2 in-window performance scores (highlighted below). Each score = base × difficulty × field-strength × quality.

Career results (200+ mile tier)

Cocodona 250 Mile Race · May 5, 2025 · 250mi continuouscounts toward rating
place 48 · 4d 03:25:49 · difficulty 2.45 · field 2.43 · quality 0.39
2,313
Moab 240 Endurance Run · Oct 11, 2024 · 240mi continuouscounts toward rating
place 14 · 3d 14:14:26 · difficulty 1.95 · field 2.04 · quality 0.68
2,690
Cocodona 250 Mile Race · May 1, 2023 · 250mi continuous
place 23 · 3d 16:16:35 · difficulty 2.45 · field 2.44 · quality 0.65
3,910