Afton Trail Run (50K/25K) MN
Baldy Peaks (50K) CA
Bishop High Sierra (50M/50K/20M) CA
Brass Monkey (50K) BC
Chuckanut Mountain Trail Race (50K) WA
Clunis Obesus Quinquaginta (50K) UK
Crown King Scramble (50K/50M) AZ
Cuyamaca-Laguna Trail Run (50K) CA
Damn Wakely Dam Ultra (50K) NY
Dave Garrison Memorial (50K/50M) CO
Dogwood Half Hundred (50K) VA
East Texas Ultra Runners (50K/25K) TX
Elkhorn Mountain Endurance Runs (50K/100K) MT
Fairfield Trail Runs (50K/50M) IA
Flatrock (50K/25K) KS
Forest of Nisene Marks (50K) CA
Golden Gate Headlands (50K) CA
Greater Toronto Ultra Race (50K/100K)
Jim Bridger Trail Run (50K/20K) MT
La Chua 50K FL
Lake McMurtry Trail Run (50K/25K) OK
Likely Mountain Run (50K/50M/10M) CA
McDonald Forest Ultramarathon (50K) OR
McKenzie River Trail Run (50K) OR
McNaughton Park Trail Runs (10/30/50/100M) IL
Mississippi Trail 50 (50M/50K/20K) MS
Napa (50K/50M) CA
Ohlone Wilderness Trail Run (50K) CA
Over The Hill Track Clubs High Desert (50k/Relay) CA
Owen-Putnam State Forest Trail Run (50K/50M/14M) IN
Pacific Crest Trail Ultra (50K/50M) OR
Quicksilver (50K/50M) CA
Quivering Quads Trail Runs (50K/50M/13.1M/10K) MO
Rattlesnake Trail (50K) W. VA
RunTex: America's Urban Ultra (50K) TX
Shadow of the Giants (50K) CA
Silver State (50K/50M/Relay) NV
Siskiyou Out Back Trail Run (50K/15K) OR
Skyline Endurance Run (50K) CA
Sylamore Trail (50K) AR
Vancouver Fat Ass (50K) BC
Walk in the Park Trail Run (50K) BC
Way Too Cool (50K) CA
Whiskeytown Trail Run (50K) CA