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

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Melissa Perez

Women · Americas · provisional rating

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
ContinuousWomen885167• new
OverallWomen885167• 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
place 66 · 3d 22:43:09 · difficulty 2.45 · field 2.30 · quality 0.39
2,200
Moab 240 Endurance Run · Oct 13, 2023 · 240mi continuouscounts toward rating
place 37 · 4d 01:04:12 · difficulty 1.95 · field 1.74 · quality 0.57
1,926