48-Hour Race Calendar

International Ultramarathon Festival — Loutraki

Loutraki, Greece · Track

The 21st International Ultramarathon Festival, an IAU Bronze Label track meeting at the Loutraki Municipal Stadium. Features 48-hour, 24-hour, and 12-hour races on a 400 m track, branded by the organizer as World Cup races.

Edition note: The organizer confirms October 22–24, 2026. Its homepage gives an October 3 application deadline, while the information page describes on-site registration with inconsistent opening and cutoff times. Confirm acceptance directly before travelling; late entry is not assured.

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.

Edition note: Online registration closes October 19 at 11:59 PM Central Time, with no late or race-day entry. The October 6 deadline for a guaranteed race shirt has passed.

Weekend at Burney

Cassel, near Burney, California, USA · Trail

A relaxed 48-hour and 24-hour trail race on a loop of about 4.6 to 4.8 miles past Baum Lake near Burney, California, with about 370 ft of climbing per lap, plus a 12-hour race and a burro race on Saturday.

Edition note: Online registration closes Saturday, October 17 at 11:59 PM Pacific Time; the October 1 swag deadline has passed. The organizer's pages describe the loop as about 4.8 miles, while the runner's guide and the UltraSignup race names say 4.6 miles; the guide counts 21 loops as 100 miles.

Día de los Muertos Endurance Run

South Beach State Park, Newport, Oregon, USA · Mixed

A timed loop race at South Beach State Park in Newport, Oregon, with 48-, 24-, 12- and 6-hour races and team relays on a 3,856 m loop of mostly flat trail with some pavement, held beside a Día de los Muertos ofrenda.

Edition note: Registration on UltraSignup closes Thursday, October 22 at 11:59 PM Pacific Time, and prices rise after October 15. The free T-shirt was guaranteed only for entries made by October 12. The organizer's event page still carries 2025 dates in its title, but its race calendar and UltraSignup give October 23–25, 2026.

Laufwochenende Brugg

Brugg, Aargau, Switzerland · Road

A 48-hour race with 24-, 12- and 6-hour options on a lit, fully paved 934 m loop on the Aare island at Geissenschachen in Brugg, doubling as the Swiss 48-, 24- and 6-hour championships.

Edition note: The 19th edition. Regular entry closes Wednesday, October 14 (48 hours CHF 220, 24 hours CHF 150); after that a CHF 20 late fee applies. Online entry stays open until October 22, with on-site entry after that, and the organizer says no race is sold out. On October 12 the RaceResult list showed 36 runners in the 48-hour race and 26 in the 24-hour race. The organizer has not linked a 2026 live results page.

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 · Mixed

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.

Jackalope Jam

Cat Spring, Texas, USA · Mixed

A timed ultrarunning festival at 7IL Ranch, where runners repeat a flat two-mile out-and-back and can choose events lasting up to 100 hours.

Edition note: The festival begins with the 100-hour race on February 17. The 48-hour race starts February 19 and the 24-hour race February 20; both start at 9:00 AM and finish February 21.

Jackpot Ultras

Cornerstone Park, Henderson, Nevada, USA · Mixed

Aravaipa’s timed-race festival at Cornerstone Park offers 48-hour and 24-hour races alongside shorter timed events and fixed distances.

Edition note: The organizer and registration page confirm February 19–21, 2027. Online entry closes February 14 at 11:59 PM Pacific Time. Recheck the selected race schedule: some shorter-race times differ between the two pages.

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.

Skanderborg Ultra

Skanderborg, Denmark · Mixed

A 48-hour race with 24- and 12-hour options on a 1 km gravel and sidewalk loop at Dyrehaven in Skanderborg, where runners can camp beside the course. The same venue hosts the GOMU 48-Hour World Championship in September 2027.

Result: Emil Ingerslev won the 2026 Skanderborg Ultra 48-hour race with 384 km, and Katja Lykke was first woman and second overall with 352 km. Both totals are above the 48-hour course records the organizer lists (358 km and 286.652 km). Ronni Carlsen (255.059 km) and Sally Barbett (211 km) won the 24-hour race.

Edition note: Registration closed October 1 at 11:59 PM (Danish time). On October 12 the RaceResult entry list showed 81 runners in the 48-hour race, 64 in the 24-hour race and 49 in the 12-hour race. The organizer’s Live Tracking link points to the 2026 RaceResult participant page.

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.

Result: Lisa Perry won the 48-hour race outright with 141.76 miles (143 laps), ahead of Thomas Crayton on 138.78 miles. Sean O’Connor won the 100-mile race in 16:05:12 and Thomas Pulaski the Saturday 24-hour with 100.12 miles.

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.

Result: Rodrigo Freeman Lopez won the 2026 48 Heures de Royan with 301.4 km (264 laps), ahead of Said Bourjila with 272.8 km. Beatrice Bourlon was the first woman and third overall with 269.4 km. In the 24-hour race, Christophe Pubert led with 191.7 km and Sophie Boiron was the first woman with 167.8 km.

Edition note: The organizer lists registration as closed. The 48-hour race is October 9–11, with the 24-hour race October 10–11 and the 12-hour race on October 10. The field is capped at 130 across all three races.

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.

Result: Greg Ponych won the 2026 Australian 6 Day with 636.459 km (446 laps), ahead of David Billett with 611.708 km. Bianca Harding was the first woman with 501.906 km, tied for third overall, and Karen Hayward was second among women with 437.025 km.

Six Days in the Dome — 48 Hour

Milwaukee, Wisconsin, USA · Track

Part of the Six Days in the Dome festival at the Pettit National Ice Center. A climate-controlled indoor 443m oval, ideal for setting records.

Result: Shawn Cissel won the men's 48-hour race with 283.367 km and Elizabeth Holder won the women's race with 221.727 km, from 20 finishers.