48-Hour Race Calendar

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.

Edition note: Online registration closes November 16 at 11:59 PM Mountain Time. The 48-hour race starts November 20 at 8:00 AM; the USATF 24-Hour Championship starts November 21 at 8:00 AM. The organizer also lists race-day registration from 7:00 AM.

Across the Years

Peoria, Arizona, USA · Mixed

A New Year fixed-time festival on a 1.42-mile dirt and paved loop at Peoria Sports Complex, with a 6-day race, rolling-start 72- to 6-hour races and 100- and 200-mile options.

Edition note: Registration is open on UltraSignup at late-tier prices, for example $795 for the 6-day, $470 for 72 hours, $325 for 48 hours and $250 for 24 hours, before tax and fees. Online registration closes Sunday, December 20 at 11:59 PM PT; Aravaipa also offers a mail-in entry form, a payment plan and race-day registration at the venue. No field caps are published. On October 20 the 2026–27 live results button on the organizer page had no link yet. UltraSignup’s race-day text names “Saturday, December 27” (2:00–6:00 PM) and 7:00 AM to noon each morning, while the organizer page lists check-in on Sunday, December 27 and race-day registration from 7:00 to 10:00 AM; December 27, 2026 is a Sunday.

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.

Taipei Ultramarathon

Xinsheng Park, Taipei, Taiwan · Road

A Taipei ultrarunning festival with 48-, 24-, 12- and 6-hour races at Xinsheng Park, plus separate fixed-distance and relay competitions.

Edition note: The October 28 organizer announcement confirms February 19–21 at Xinsheng Park opposite Lin An Tai Historical House. This is separate from the Soochow invitational. The festival window does not mean all races start on February 19.

Festival de Ultrafondo — Gran Premio Ciudad de Burjassot

Burjassot, Valencia, Spain · Road

The seventh Burjassot ultradistance festival includes a 48-hour road race and a separate 24-hour race, both listed with IAU Bronze Labels, near Valencia.

Edition note: The 2027 Spanish regulations and IAU calendar agree on April 2–4. The promotional flyer instead prints March 2–4; confirm that discrepancy with the organizer before booking travel. The club’s linked registration page advertises open entries.

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.

Sommer 24+48 Stunden Lauf Freudenstadt-Grüntal

Freudenstadt-Grüntal, Germany · Road

A summer timed race in the Black Forest, adding a first 48-hour edition alongside the third Sommer24hLauf in 2027.

Edition note: The organizer confirms August 27–29, 2027, with the 24-hour race starting August 28.

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.

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.

Result: Alvin Chan led the 48-hour race with 158.136 miles; Molly Krantz led the women with 107.820 miles.

Edition note: The October 23–25, 2026 edition is complete and its solo 48-hour results are archived below. The organizer’s event-page title previously retained 2025 dates; its race calendar and UltraSignup identified the 2026 edition.

Laufwochenende Brugg

Brugg, Aargau, Switzerland · Road

A 48-hour race with 24-, 12- and 6-hour options on a lit, fully paved 934.8 m loop on the Aare island at Geissenschachen in Brugg, doubling as the Swiss 48-, 24- and 6-hour championships.

Result: Julia Fatton covered 329.397 km in the 48-hour race; Christian Stolovitz led the men with 316.897 km.

Edition note: The 19th edition finished on October 25, 2026. RaceResult now publishes the 48-, 24-, 12- and 6-hour results; the 48-hour outcome is archived below. The organizer’s older results archive had not yet added 2026 when checked on October 26.

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.

Result: Vouzonis Thomas leads the published 48-hour classification with 305190 m. Eleven of fifteen starters are ranked.

Edition note: The October 22–24, 2026 edition is complete and its 48-hour results are archived below. Before the race, the homepage gave an October 3 application deadline while another information page described on-site registration with inconsistent times; those notices do not establish a future edition’s entry rules.

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.

Result: Jeff Mikesell (146.078 miles) and Jill Hudson (140.284 miles) led the 48-hour race. Jennifer Cecil won the 72-hour outright with 211.832 miles.

Edition note: The October 22–25 edition is complete. Official 72-, 48- and 24-hour results are archived below; the 2026 registration deadline and entry rules remain historical information.

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.

Result: The published 48-hour classification lists Vincent Difrancesco first with 161.00 miles and Lennyann Bishop first woman with 105.80 miles; the leader’s elapsed time needs clarification.

Edition note: The October 22–24 edition is complete and its published 48-hour results are archived below, with an elapsed-time discrepancy flagged. 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.

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 2026 event is complete. The 48-hour race ran October 9–11, with the 24-hour race October 10–11 and the 12-hour race on October 10. The advertised cap was 130 across all three races; this is not a count of starters or finishers.

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.