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

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Jim Miller

Men · Americas

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
ContinuousMen1,417261• new
OverallMen1,417261• 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)

Bigfoot 200 Endurance Run · Aug 8, 2025 · 200mi continuouscounts toward rating
place 157 · 4d 09:24:26 · difficulty 2.65 · field 2.50 · quality 0.22
1,435
Tahoe 200 Mile Endurance Run · Jun 13, 2025 · 200mi continuouscounts toward rating
DNF · 200mi covered · difficulty 2.35 · field 2.32 · quality 1.00
1,909
Cowboy 200 · Sep 13, 2024 · 200mi continuous
place 45 · 3d 11:27:35 · difficulty 0.95 · field 1.17 · quality 0.29
323
Tahoe 200 Mile Endurance Run · Jun 14, 2024 · 200mi continuouscounts toward rating
DNF · 200mi covered · difficulty 2.35 · field 2.02 · quality 1.00
1,664
Cowboy 200 · Sep 15, 2023 · 200mi continuous
place 16 · 3d 00:15:25 · difficulty 0.95 · field 0.71 · quality 0.48
323
Bigfoot 200 Endurance Run · Aug 11, 2023 · 200mi continuous
DNF · 200mi covered · difficulty 2.65 · field 1.81 · quality 1.00
1,680
Moab 240 Endurance Run · Oct 7, 2022 · 240mi continuous
DNF · 240mi covered · difficulty 1.95 · field 1.86 · quality 1.00
1,271
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
DNF · 200mi covered · difficulty 2.65 · field 1.87 · quality 1.00
1,736