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

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Clayton Foster

Men · Americas · b. 1984 (40-49) · provisional rating

Also seen as: Foster, Clayton

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
BackyardMen351878• new
ContinuousMen945546• new
OverallMen930554• 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)

Tahoe 200 Mile Endurance Run · Jun 13, 2025 · 200mi continuouscounts toward rating
place 31 · 3d 05:18:30 · difficulty 2.35 · field 2.32 · quality 0.50
2,735
(race) · · ?mi counts toward rating
place 32 · · 12 yards · difficulty ? · field ? · quality 0.15
12