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

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Erin Clark

Women · Americas · provisional rating

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
ContinuousWomen938154• new
OverallWomen938154• 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 · Apr 4, 2025 · 304mi continuouscounts toward rating
place 145 · 6d 04:22:27 · difficulty 2.20 · field 2.26 · quality 0.38
1,887
Tahoe 200 Mile Endurance Run · Jun 14, 2024 · 200mi continuouscounts toward rating
place 93 · 3d 20:43:17 · difficulty 2.35 · field 2.02 · quality 0.38
1,783
Moab 240 Endurance Run · Oct 7, 2022 · 240mi continuous
place 14 · 3d 11:32:24 · difficulty 1.95 · field 1.86 · quality 0.51
1,852
Tahoe 200 Mile Endurance Run · Jun 17, 2022 · 200mi continuous
DNF · 200mi covered · difficulty 2.35 · field 2.02 · quality 1.00
1,664
Bigfoot 200 Endurance Run · Aug 13, 2021 · 200mi continuous
place 37 · 3d 16:45:48 · difficulty 2.65 · field 1.87 · quality 0.46
2,304