100 Miles Ultra Running Events in Ontario

Upcoming Events

Date Event City Distances
07/25/26 Tally in the Valley Dundas 6 Hours , 12 Hours , 12 Hours , 24 Hours , 100 Miles
09/12/26 Haliburton Forest Trail Race West Guildford 50 KM , 50 Miles , 100 Miles

Past Events

Date Event City Distances
05/23/26 Sulphur Springs Trail Race Ancaster 50 KM , 50 Miles , 100 KM , 100 Miles , 200 Miles
04/18/26 The Foxtail Rail Trail Race Dundas 50 KM , 50 Miles , 100 KM , 100 Miles
09/24/22 Ultra Trail Stokely Creek Goulais River 56 KM , 85 KM , 100 Miles
12/01/12 Creemore Horizontal Creemore 100 Miles
04/23/11 Jerseyville Fat Ass Jerseyville 100 Miles
06/21/88 Ontario Northland 161 Km Challenge Chelmsford 100 Miles

Weekly Newsletter

A roundup of the week's content and most recent race results. Sent once a week on Thursday.

Recent Results

Denali 135, 100k & 50k
Paxson, AK - 70 finishers
135 Miles | 100 KM | 50 KM
Ring the Springs
Colorado Springs, CO - 127 finishers
100 KM | 50 KM
Rachel Carson Trail Challenge
Pittsburgh, PA - 516 finishers
37.5 Miles
Alpine Solstice
Bend, OR - 60 finishers
55 KM
Sparks Backyard Ultra
Sparks, NV - 23 finishers
24 Hours | 12 Hours | 6 Hours | Backyard
White Pine Solstice Runs
Tooele, UT - 13 finishers
55 KM
Mid-State Mile
Franklin, TN - 70 finishers
Backyard
Broken Arrow Skyrace
Olympic Valley, CA - 552 finishers
46 KM
Old Gabe
Bozeman, MT - 12 finishers
50 KM
View All Results