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

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Jason Geroux

Men · Americas · provisional rating

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
ContinuousMen674963• new
OverallMen674962• new

Why this rank

The Overall rating is the time-decayed mean of this athlete’s best 1 in-window performance scores (highlighted below). Each score = base × difficulty × field-strength × quality.

Career results (200+ mile tier)

Arizona Monster 300 · Mar 27, 2026 · 304mi continuouscounts toward rating
place 45 · 6d 02:58:13 · difficulty 2.20 · field 2.45 · quality 0.36
1,923