Explore by location
100K events around the world
Build your racing calendar, close to home or further afield. Compare 122 upcoming events by date and location. Open a race guide for the course, recorded editions and official entry information where available.
Events to explore include Race to the King, RunThrough Trails Morzine-Avoriaz and Two Roses Ultra.
Start with a continent, including North America, Europe and Oceania, or browse the other locations below.
Compare running races by distance, date and surface, from shorter road events to trail races and ultras.
155 listed events · 122 with upcoming dates · 1 upcoming featured races
Upcoming 100k events
122 matching events, earliest date first. Entry availability is shown separately.
Race to the King
ENGWest Dean, West Sussex
Race to the King — a verified UTMB Index race for the 2026 edition.
Date listed · latest organiser confirmation not yet checked.
RunThrough Trails Morzine-Avoriaz
FRAMorzine, Auvergne-Rhône-Alpes
Alpine trail races over 100K, 50K and 25K in the Morzine Valley.
Date listed · latest organiser confirmation not yet checked.
Two Roses Ultra
ENGHebden Bridge, North of England
Two Roses Ultra — Wadsorth Community Centre, Hebden Bridge. Listed on runABC (North of England).
Date listed · latest organiser confirmation not yet checked.
Tralee 100K Ultra Marathon
IRLTralee, Kerry
Tralee 100K Ultra Marathon — 100K.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
North Yorks Ultra Challenge
ENGScarborough, North Yorkshire
North Yorks Ultra Challenge in Scarborough.
Date listed · latest organiser confirmation not yet checked.
Ultra Trail Whistler by UTMB
CANCreekside Plaza
Ultra Trail Whistler by UTMB — an official UTMB World Series Event.
Date listed · latest organiser confirmation not yet checked.
Ham & Lyme Summer
ENGHam Hill / Lyme Regis, Somerset / Dorset
Ham & Lyme Summer in Ham Hill / Lyme Regis.
· Entry closed
Date listed · latest organiser confirmation not yet checked.
Peak District Challenge
ENGBakewell, Derbyshire
Peak District Challenge — a verified UTMB Index race for the 2026 edition.
Date listed · latest organiser confirmation not yet checked.
Serpent Trail Race
ENGPetersfield, Hampshire
Serpent Trail Race in Petersfield.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Silverheels Trail Runs
USAComo, Colorado
High-altitude trail and dirt-road races around Como and the South Park Valley.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Lakeland Trails Ultra & Ambleside Trail Runs
ENGAmbleside, Cumbria
Lakeland Trails Ultra & Ambleside Trail Runs in Ambleside.
Date listed · latest organiser confirmation not yet checked.
Race to the Stones
ENGLewknor, Oxfordshire
Race to the Stones in Lewknor.
Date listed · latest organiser confirmation not yet checked.
Siskiyou Out Back Trail Runs
USAAshland, Oregon
Mountain trail races around Ashland and the Siskiyou Crest.
Date listed · latest organiser confirmation not yet checked.
Vero Beach Octopus Ultra
USAVero Beach, Florida
Ultras through the exposed and shaded trails around Vero Beach.
Date listed · latest organiser confirmation not yet checked.
Gower Peninsula Ultra Challenge
WALPenrice, Swansea
Gower Peninsula Ultra Challenge in Penrice.
Date listed · latest organiser confirmation not yet checked.
Rise in the Pines
USASmithville, Texas
Loop trail races through the pine woods of Rocky Hill Ranch.
Date listed · latest organiser confirmation not yet checked.
Beacons Way Ultra 100KM
WALTalybont-on-Usk, Powys
Beacons Way Ultra 100KM in Talybont-on-Usk.
Date listed · latest organiser confirmation not yet checked.
Lost Sierra Endurance Race
USADownieville, California
Mountain trail races through the northern Sierra Nevada around Downieville.
Date listed · latest organiser confirmation not yet checked.
Badger Trail Races by Ten Junk Miles Racing
USABelleville, Wisconsin
Rail-trail races on the Badger State and Jane Addams trails.
Date listed · latest organiser confirmation not yet checked.
Stour Valley Path Ultra Run
ENGSuffolk, Midlands
Stour Valley Path Ultra Run — Memorial Hall, Newmarket, Suffolk. Listed on runABC (Midlands).
Date listed · latest organiser confirmation not yet checked.
Ultra-Trail du Fjord-du-Saguenay
CANQuébec
Ultra-Trail du Fjord-du-Saguenay in Bas-Saguenay, Canada.
Date listed · latest organiser confirmation not yet checked.
Foxton Hound Ultra
ENGLeicestershire, Midlands
Foxton Hound Ultra — Winwick Hall, Winwick, Leicestershire. Listed on runABC (Midlands).
Date listed · latest organiser confirmation not yet checked.
Olympic Mountains Trail Races
USAQuilcene, Washington
Mountain trail races through the Olympic National Forest near Quilcene.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Shawnee Hills Trail Races
USAOzark, Illinois
Technical trail ultras through the sandstone hills and forests around Camp Ondessonk.
Date listed · latest organiser confirmation not yet checked.
South Coast Challenge
ENGEastbourne, South of England
South Coast Challenge — Bramley Camping Park, Eastbourne. Listed on runABC (South of England).
Date listed · latest organiser confirmation not yet checked.
Ultra 4 Albania Mountain Race
ALBKsamil, Vlorë County
A southern Albanian mountain challenge offering 25 km, 50 km and a two-day 100 km race.
Date listed · latest organiser confirmation not yet checked.
Wildcat Ultras
USAPensacola, Florida
Ultras on a flat grass and dirt loop at the Escambia County Equestrian Center.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Pine Creek Challenge
USAWellsboro, Pennsylvania
Out-and-back endurance races on the Pine Creek Rail Trail.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Thames Path Challenge
ENGLondon, South of England
Thames Path Challenge — Bishops Park, London. Listed on runABC (South of England).
Date listed · latest organiser confirmation not yet checked.
Grindstone Trail Running Festival
USANatural Chimneys Park, VA
Grindstone Trail Running Festival — an official UTMB World Series Event.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Race archive
Past races and previous editions
Looking back at a race? Browse the guides below for recorded editions. This section also includes events awaiting a new date and cancelled editions. Previous editions of races in the upcoming calendar are available through their race guides above.
Open the race archive to browse past events and races awaiting a new date.
View full race archive (33) →