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

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Jason Tanner

Men · Americas

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
ContinuousMen929556• new
OverallMen929555• 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 4, 2026 · 250mi continuouscounts toward rating
DNF · 250mi covered · difficulty 2.45 · field 2.30 · quality 1.00
1,973
Viper 200 · Apr 2, 2025 · 200mi continuouscounts toward rating
place 2 · 1d 22:52:00 · difficulty 1.00 · field 0.85 · quality 0.96
808