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 NI & Ulster 50K / 100K Championships, Leatherwood Ultras and Northern Traverse Series.
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.
NI & Ulster 50K / 100K Championships
NIRBelfast, Antrim
NI & Ulster 50K / 100K Championships — 100K, 50K.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Leatherwood Ultras
USAFerguson, North Carolina
Hilly trail ultras on private trails in the Leatherwood Mountains.
Date listed · latest organiser confirmation not yet checked.
Northern Traverse Series
ENGSt Bees, Cumbria / North Yorkshire
Northern Traverse Series — 300K, 100K, 80K, 55K at St Bees to Robin Hood's Bay and sectional routes across northern England.
Date listed · latest organiser confirmation not yet checked.
Canalathon-Ultra Running Festival 2027
ENGSowerby Bridge, West Yorkshire
Canalathon-Ultra Running Festival 2027 — an officially published half-marathon fixture at Rochdale Canal from Todmorden to Sowerby Bridge.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Desert Peak Ultra
USAOracle, Arizona
Mountain and desert trail ultras near Oracle and Mount Lemmon.
Date listed · latest organiser confirmation not yet checked.
Desert RATS Trail Running Festival by UTMB
USAFruita, Colorado
Desert RATS Trail Running Festival by UTMB — an official UTMB World Series Event.
Date listed · latest organiser confirmation not yet checked.
Ozark Foothills Endurance Runs
USAWildwood, Missouri
Trail races through the hills of Wildwood, with Friday night and Sunday options.
Date listed · latest organiser confirmation not yet checked.
Zion Ultras
USAApple Valley, Utah
Desert trail races around Apple Valley near Zion National Park.
Date listed · latest organiser confirmation not yet checked.
Devon Coast To Coast Ultra Marathon
ENGnr Plymouth, South of England
Devon Coast To Coast Ultra Marathon — Wembury, nr Plymouth. Listed on runABC (South of England).
Date listed · latest organiser confirmation not yet checked.
Leona Divide
USALake Hughes, California
Mountain trail ultras and a 30K starting in Lake Hughes.
Date listed · latest organiser confirmation not yet checked.
Lumberjack 100
USAPort Gamble, Washington
Loop trail ultras through the Port Gamble uplands.
Date listed · latest organiser confirmation not yet checked.
Stillhouse 100K
USASoddy-Daisy, Tennessee
Trail ultramarathon in the Soddy-Daisy area.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
The Canyons Endurance Runs™ by UTMB®
USAAuburn, California
The Canyons Endurance Runs™ by UTMB® — an official UTMB World Series Event.
Date listed · latest organiser confirmation not yet checked.
Jack Bristol Lake Waramaug Ultra Races
USAKent, Connecticut
Road ultras around scenic Lake Waramaug.
Date listed · latest organiser confirmation not yet checked.
Coyote Two Moon
USAOjai, California
Mountain ultras through Los Padres National Forest above Ojai.
Date listed · latest organiser confirmation not yet checked.
Salt Flats Endurance Runs
USAWendover, Utah
Ultras across the Bonneville Salt Flats and surrounding hills, with a shorter fun run.
Date listed · latest organiser confirmation not yet checked.
Desert Wolf
USAJohnson City, Texas
Trail ultras and shorter races at Flat Creek Crossing Ranch.
Date listed · latest organiser confirmation not yet checked.
Rise Sasquatch Shuffle
USAGrapeland, Texas
Loop trail races at Salmon Lake Park near Grapeland.
Date listed · latest organiser confirmation not yet checked.
Traverse City Trail Running Festival
USATraverse City, Michigan
A two-day trail-running festival on the Pere Marquette Forest trails.
Date listed · latest organiser confirmation not yet checked.
Jurassic Coast Ultra Challenge
ENGCorfe Castle, Dorset
Jurassic Coast Ultra Challenge in Corfe Castle.
Date listed · latest organiser confirmation not yet checked.
London 2 Brighton Ultra Challenge
ENGRichmond, Greater London
London 2 Brighton Ultra Challenge in Richmond.
Date listed · latest organiser confirmation not yet checked.
Mountain Ultra Trail by UTMB
RSAGeorge
Mountain Ultra Trail by UTMB — an official UTMB World Series Event.
Date listed · latest organiser confirmation not yet checked.
Eagle Up Ultra
USACanal Fulton, Ohio
Endurance races on a flat limestone towpath loop from St Helena Park.
Date listed · latest organiser confirmation not yet checked.
Lake District Ultra Challenge
ENGKendal, Cumbria
Lake District Ultra Challenge in Kendal.
Date listed · latest organiser confirmation not yet checked.
Malibu Canyon Trail Races
USAMalibu, California
Trail ultras and shorter races in Point Mugu State Park.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Ultra Trail Chattanooga by UTMB
USAChattanooga Tennessee
Ultra Trail Chattanooga by UTMB — an official UTMB World Series Event.
Date listed · latest organiser confirmation not yet checked.
Weld Your Mettle Running Festival
USAEaton, Colorado
Loop running races and timed endurance challenges near Eaton.
Date listed · latest organiser confirmation not yet checked.
Cotswold Way Ultra Challenge
ENGCirencester, Gloucestershire
Cotswold Way Ultra Challenge in Cirencester.
Date listed · latest organiser confirmation not yet checked.
Kaniksu Trail Runs
USAFrater Lake, Washington
Mountain trail races in the Lower Selkirk Mountains from Frater Lake.
Date listed · latest organiser confirmation not yet checked.
Denali Ultras
USAAlpine Creek, Alaska
An endurance run along the Denali Highway from Alpine Creek Lodge towards Cantwell.
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) →