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

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Amelia Griffith

Women · · provisional rating

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
ContinuousWomen745207• new
OverallWomen745207• 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)

Arizona Monster 300 · Mar 27, 2026 · 304mi continuouscounts toward rating
place 51 · 6d 09:04:25 · difficulty 2.20 · field 2.45 · quality 0.33
1,787
Moab 240 Endurance Run · Oct 13, 2023 · 240mi continuouscounts toward rating
place 41 · 4d 02:13:05 · difficulty 1.95 · field 1.74 · quality 0.55
1,885