2017 - 2018 USA Flat Ultramarathon Calendar

Browse our Ultramarathon Calendar for races organized in USA bearing the tag Flat among 27 races.

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27 races

Canal Corridor 100 Mile Endurance Run

July 08, 2017 Race day in 2 months
USA / East North Central / Ohio / Akron
Ultramarathon - 100 miles
Flat Fast

The Pinellas Trail Challenge

September 02, 2017 Race day in 4 months
USA / South Atlantic / Florida / St. Petersburg
Ultramarathon - 46 miles
Flat Urban Trail

Pony Express Trail 50 and 100

Pony Express Trail 100
October 20, 2017 Race day in 6 months
USA / Mountain Region / Utah / Faust
Ultramarathon - 100 miles
Flat Desert Trail

Pony Express Trail 50 and 100

Pony Express Trail 50
October 20, 2017 Race day in 6 months
USA / Mountain Region / Utah / Faust
Ultramarathon - 50 miles
Flat Desert Trail

Ghost of Seattle Marathon, Half Marathon & 50K

Ghost of Seattle 50K
November 25, 2017 Race day in 7 months
USA / Pacific / Washington / Seattle
Ultramarathon - 50 kilometers
Flat Road Running

New River Trail

50K
October 01, 2016 The race has already taken place.
USA / South Atlantic / Virginia / New River Trail State Park
Ultramarathon - 50 kilometers
Flat Green Trail

DPR Trail Races

Des Plaines River Tail 50 Miles
October 15, 2016 The race has already taken place.
USA / East North Central / Illinois / Lake County Forest Preserve
Ultramarathon - 50 miles
Flat Trail

Brazos Bend 100

Brazos Bend 100 Miler
December 10, 2016 The race has already taken place.
USA / West South Central / Texas / Needville
Ultramarathon - 100 miles
Flat Fun Trail Fast Relay

Brazos Bend 100

Brazos Bend 50 Miler
December 10, 2016 The race has already taken place.
USA / West South Central / Texas / Needville
Ultramarathon - 50 miles
Flat Fun Trail Fast

Daytona 100 Ultramarathon

Daytona 100
December 10, 2016 The race has already taken place.
USA / South Atlantic / Florida / Daytona Beach
Ultramarathon - 100 miles
Charity Flat Fast

Daytona 100 Ultramarathon

Daytona 50
December 10, 2016 The race has already taken place.
USA / South Atlantic / Florida / Daytona Beach
Ultramarathon - 50 miles
Charity Flat Fast

Houston Running Festival

Houston Running Festival 100K
December 17, 2016 The race has already taken place.
USA / West South Central / Texas / Houston
Ultramarathon - 100 kilometers
Flat

Houston Running Festival

Houston Running Festival 100 Mile
December 17, 2016 The race has already taken place.
USA / West South Central / Texas / Houston
Ultramarathon - 100 miles
Flat

Houston Running Festival

Houston Running Festival 50K
December 17, 2016 The race has already taken place.
USA / West South Central / Texas / Houston
Ultramarathon - 50 kilometers
Flat

Houston Running Festival

Houston Running Festival 50 Mile
December 17, 2016 The race has already taken place.
USA / West South Central / Texas / Houston
Ultramarathon - 50 miles
Flat