Crawlable format calendar
48-Hour Race Calendar
Find curated 48-hour ultramarathons across loop, track, road and trail venues. Each listing connects the edition with its detailed record and official organizer sources.
- Curated listings
- 10
- Active or upcoming
- 9
- Archived editions
- 1
Active and Upcoming 48-Hour Races
Listed editions that are in progress or have not yet ended, ordered by start date.
Australian 6 Day Ultramarathon Festival
Paradise, South Australia, Australia · Road
A six-day fixed-time festival on a 1.426 km loop at Thorndon Park, with 72-hour and 48-hour races joining later in the week.
48 Heures de Royan
Royan, France · Road
A French fixed-time festival on a traffic-free stadium circuit of about one kilometre, led by the 48-hour race.
Hainesport Endurance Run
Hainesport, New Jersey, USA · Road
A flat paved-loop festival with 48-hour, two 24-hour starts, 12-hour, relay, and 100-mile options at Hainesport Township Park.
International Ultramarathon Festival — Loutraki
Loutraki, Greece · Track
The 21st edition of this World Cup festival on a 400m tartan track. Features 48-hour, 24-hour, and 12-hour races in a supportive Mediterranean setting.
The Endless Mile
Alabaster, Alabama, USA · Road
A 72-hour, 48-hour, and 24-hour festival on a certified, paved, lighted 1.00203-mile loop at Veterans Park.
Fat Ox Endurance Runs
Goodyear, Arizona, USA · Road
A fixed-time festival on a certified 0.988178-mile concrete loop, headlined by the 48-hour race and 2026 USATF 24-Hour Championships.
Across the Years
Peoria, Arizona, USA · Road
A legendary multi-day running festival spanning New Year's Eve. Offers 6-hour to 6-day fixed-time races plus fixed-distance options. Organized by Aravaipa Running.
NZ Ultramarathon Festival — 6 Day
Hagley Park, Christchurch, New Zealand · Road
A fully catered six-day race on a flat 1.9464 km park loop, part of a ten-day Christchurch festival with 72-, 48-, and 24-hour options.
GOMU 48-Hour World Championship
Skanderborg, Denmark · Road
The 2027 Global Organization of Multi-Day Ultramarathoners 48-hour world championship, hosted by Skanderborg Ultra in Denmark.
Past 48-Hour Race Editions
Archived listed editions retained for organizer, format and course research.
Calendar FAQs
Does this page list every 48-hour race?
No. It contains the source-checked 48-hour events currently included in the directory. Organizer and federation calendars may contain additional races.
What happens after an edition finishes?
The edition moves into the archive after its listed end date. Its record remains available for research, while the organizer is the source for a future edition.
Where can I learn how 48-hour racing works?
Use the 48-hour format guide for rules, pacing demands, sleep loss, preparation and related planning resources.
Keep Planning
Current calendar: 48-Hour Races