2017 - 2018 USA Flat Ultramarathon Calendar

Browse our Ultramarathon Calendar for races organized in USA bearing the tag Flat among 30 races.

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30 races

Pickled Feet 24/12/6 Hour Runs

Pickled Feet 100 Mile Run
March 24, 2017 Race day in 2 days
USA / Mountain Region / Idaho / Eagle Island State Park
Ultramarathon - 100 miles
Flat

Biffledinked 10 x 5k

Biffledinked 10 x 5k
April 22, 2017 Race day in about 1 month
USA / South Atlantic / Virginia / Virginia Beach
Ultramarathon - 50 kilometers
Flat Road Running

Biffledinked 10 x 5k

Biffledinked 10 x 5k 2 Person Relay
April 22, 2017 Race day in about 1 month
USA / South Atlantic / Virginia / Virginia Beach
Ultramarathon - 50 kilometers
Flat Road Running

Snake River Island Hop

Snake River Island Hop 100K
April 22, 2017 Race day in about 1 month
USA / Pacific / Washington / Ice Harbor Dam, Pasco
Ultramarathon - 100 kilometers
Flat

Snake River Island Hop

Snake River Island Hop 50K
April 22, 2017 Race day in about 1 month
USA / Pacific / Washington / Ice Harbor Dam, Pasco
Ultramarathon - 50 kilometers
Flat

Canal Corridor 100 Mile Endurance Run

July 08, 2017 Race day in 4 months
USA / East North Central / Ohio / Akron
Ultramarathon - 100 miles
Flat Fast

The Pinellas Trail Challenge

September 02, 2017 Race day in 5 months
USA / South Atlantic / Florida / St. Petersburg
Ultramarathon - 46 miles
Flat Urban Trail

OBX Ultramarathon

No race in 2016
USA / South Atlantic / North Carolina / Corolla
Ultramarathon - 50 kilometers
Flat Fun Green Trail North Carolina Ultra Series Sand Barefoot

Dances with Dirt Green Swamp

DWD Green Swamp 50K
March 12, 2016 The race has already taken place.
USA / South Atlantic / Florida / Dade City
Ultramarathon - 50 kilometers
RunningFit Flat Trail

Dances with Dirt Green Swamp

DWD Green Swamp 50M
March 12, 2016 The race has already taken place.
USA / South Atlantic / Florida / Dade City
Ultramarathon - 50 miles
RunningFit Flat Trail

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

Pony Express Trail 50 and 100

Pony Express Trail 100
October 21, 2016 The race has already taken place.
USA / Mountain Region / Utah / Faust
Ultramarathon - 100 miles
Flat Desert Trail

Pony Express Trail 50 and 100

Pony Express Trail 50
October 21, 2016 The race has already taken place.
USA / Mountain Region / Utah / Faust
Ultramarathon - 50 miles
Flat Desert Trail

Ghost of Seattle Marathon, Half Marathon & 50K

Ghost of Seattle 50K
November 26, 2016 The race has already taken place.
USA / Pacific / Washington / Seattle
Ultramarathon - 50 kilometers
Flat Road Running