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

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Scott Chapman

Men · Americas · provisional rating

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
ContinuousMen825879• new
OverallMen825869• 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)

Across the Years (200 Miler) · Dec 28, 2023 · 200mi continuouscounts toward rating
place 7 · 3d 15:47:54 · difficulty 1.00 · field 0.48 · quality 0.47
226
Tahoe 200 Mile Endurance Run · Jul 21, 2023 · 200mi continuouscounts toward rating
DNF · 200mi covered · difficulty 2.35 · field 1.59 · quality 1.00
1,307