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

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Jennie Chisholm

Women · Americas

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
ContinuousWomen2,10117• new
OverallWomen2,10117• new

Why this rank

The Overall rating is the time-decayed mean of this athlete’s best 3 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 55 · 3d 17:28:28 · difficulty 2.45 · field 2.30 · quality 0.43
2,437
Cocodona 250 Mile Race · May 5, 2025 · 250mi continuouscounts toward rating
place 31 · 3d 17:19:58 · difficulty 2.45 · field 2.43 · quality 0.47
2,805
Cocodona 250 Mile Race · May 6, 2024 · 250mi continuouscounts toward rating
place 89 · 4d 07:58:03 · difficulty 2.45 · field 2.43 · quality 0.37
2,207