2017 - 2018 Ultramarathon Calendar in May

Browse our Ultramarathon Calendar for races organized around the world during the month of May among 354 races.

354 races

Greenland Trail 50k

May 05, 2018 Race day in 10 months
USA / Mountain Region / Colorado / Larkspur
Ultramarathon
Trail Fast

Bilstein-Marathon

May 06, 2018 Race day in 10 months
Germany / Hesse / Witzenhausen
Ultramarathon
Hilly Trail

Glacier Ridge Trail Ultramarathon

May 12, 2018 Race day in 10 months
USA / Mid-Atlantic / Pennsylvania / Moraine State Park
Ultramarathon
Hilly Trail Relay

Glacier Ridge Trail Ultramarathon

May 12, 2018 Race day in 10 months
USA / Mid-Atlantic / Pennsylvania / Moraine State Park
Ultramarathon
Hilly Trail

Glacier Ridge Trail Ultramarathon

May 12, 2018 Race day in 10 months
USA / Mid-Atlantic / Pennsylvania / Moraine State Park
Ultramarathon
Hilly Trail

Knock on Wood

May 18, 2018 Race day in 10 months
USA / South Atlantic / South Carolina / Greenville
Ultramarathon
Trail

Keys 100

May 19, 2018 Race day in 10 months
USA / South Atlantic / Florida / Key Largo
Ultramarathon
Charity Relay

Keys 100

May 19, 2018 Race day in 10 months
USA / South Atlantic / Florida / Key Largo
Ultramarathon

Keys 100

May 19, 2018 Race day in 10 months
USA / South Atlantic / Florida / Key Largo
Ultramarathon
Relay

TorTour de Ruhr

May 19, 2018 To be confirmed Race day in 10 months
Germany / North Rhine-Westphalia / Winterberg/ Duisburg
Ultramarathon

Scotiabank Calgary Marathon

May 27, 2018 Race day in 10 months
Canada / Alberta / Calgary
Ultramarathon
Charity Road Running

Scotiabank Calgary Marathon

May 27, 2018 Race day in 10 months
Canada / Alberta / Calgary
Ultramarathon
Charity Road Running Relay
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