2027 Multiday & Ultramarathon Calendar

Tuscobia Winter Ultra

Rice Lake, Wisconsin, USA · Trail

A 160-mile out-and-back winter race from Rice Lake on Wisconsin's Tuscobia State Trail, by foot, bike or ski, with water-only checkpoints, mandatory camping gear and a 65-hour limit on foot.

Edition note: The 17th edition runs December 31, 2026 to January 3, 2027, with the 160-mile run and ski starting Friday, January 1. It is the first under new organizers Kari Gibbons and Erik Raivo, announced on June 8, 2026, after Chris and Helen Scotch stepped away. Applications for this invitational event were taken on UltraSignup in August 2026 and are closed; fees are charged only on acceptance. The organizer's post gives the window as August 15–29, while UltraSignup says applications closed on August 21. If places open up later, late fees apply. On October 20 the course and schedule pages still listed the Winter Huskies checkpoint location as TBD, and the rules page kept an older line calling bivy sacks and sleeping bags optional, which conflicts with this year's mandatory sleeping bag, pad and bivy.

Brazil 135 Ultra Journey

Águas da Prata, São Paulo, to Paraisópolis, Minas Gerais, Brazil · Mixed

A 240 km (150-mile) non-stop race on the Caminho da Fé pilgrim route through the Serra da Mantiqueira, from Águas da Prata to Paraisópolis, with optional earlier finishes and a 68-hour limit.

Edition note: Entry is closed. Regular registration ended on July 31, 2026, the extension for Badwater and Brazil 135 veterans on August 31, and the 2027 roster was announced on September 7. The old domain brazil135.com.br showed a hosting error on October 20; the official site is brazil135.net. Sources differ on the time limit (68 hours in the organizer’s 2027 regulations, 72 hours in DUV) and on the international entry fee (US$1,540 on the rules page, US$1,560 in the regulations PDF, US$1,300 in DUV).

Dizzy Horse Backyard Ultra

Bonneville County Fairgrounds and Sandy Downs Park, Idaho Falls, Idaho, USA · Mixed

A winter backyard ultra in Idaho Falls, Idaho, looping 4.167 miles every hour through Sandy Downs Park from an indoor transition hall at the Bonneville County Fairgrounds.

Edition note: The fifth edition, and the first in January: the four earlier races were held in December from 2022 to 2025. Registration is open on RunSignup until January 6, 2027, with 76 of 110 places left on October 20. The 2025 race sold out. Big's race page lists the category as "Bronze", and the organizer's text there says Dizzy Horse "is a Bronze Qualifier that feeds into the Banana Slug Silver Qualifier". The organizer's site adds that the winner "on odd years" gets a paid, guaranteed entry into a Silver Qualifier. The organizer gives about 50 ft of climb per lap; Big's listing says 80 ft.

Fat Pursuit

Island Park, Idaho, USA · Trail

A 200 km winter race on groomed snowmobile trails around Island Park, Idaho, by fat bike, ski or foot, on an unmarked course navigated by GPS, with three heated checkpoints and a water-boil test.

Edition note: The 2027 200K is listed for January 8–10, 2027, and the 30K and 60K for Saturday, January 9. Registration is open on Athlete360: the 200K costs $375, or $325 with the early-bird discount through November 27, 2026. On October 20 the 200K roster showed 17 entrants, three of them on foot and two on skis. The organizer's race-details page still showed the 2026 schedule, prices and refund dates, so 2027 race-week times and cutoffs had not been confirmed.

MDS Ultra Morocco

Erfoud, Morocco · Desert

A non-stop, food-self-sufficient Sahara race from Erfoud on parts of the MDS Legendary route, over 100 miles or 100 km, with a 40-hour limit and a 4 km/h minimum speed.

Edition note: Second edition. Registration was open on October 20, 2026 at €1,950 per person, with €100 off for the first 100 registrants. Cancelling between October 5 and November 8, 2026 forfeits 50% of the fee and there are no refunds after that; free postponement ends October 25, and a €250 postponement fee applies until November 29. The 2027 regulations page asked for a login when checked, so the rules here come from the organizer’s event and format pages.

Bandera 100K

Hill Country State Natural Area, Bandera, Texas, USA · Trail

A 100 km trail race of two counterclockwise 50 km loops on rocky, sotol-lined hills in Hill Country State Natural Area, with about 6,600 ft of climbing and a 25-hour limit.

Edition note: Registration is open on RunSignup. On October 20, 2026 the prices were $245 for the 100K, $160 for the Sunday 50K, $139 for the 25K and $160 for the Saturday non-competitive 50K, which had 22 places left. Entries after December 1 get other swag instead of a shirt. Tejas Trails gives no refunds, and deferral credit shrinks closer to race day. Bandera is a Western States qualifier for 100K finishers within 18 hours, but it is not a 2027 Golden Ticket race, and a 2027 USATF championship designation has not been verified here.

Oman Desert Marathon

Bidiyah, Ash Sharqiyah, Oman · Desert

A five-stage, 165 km self-sufficient race across Oman's red, golden, and white dunes, with runners carrying their food and sleeping equipment.

Vietnam Highlands Trail by UTMB

Da Lat, Lam Dong, Vietnam · Mountain

The 101.5 km 100K Langbiang runs from Lam Vien Square in Da Lat over Langbiang, Elephant Mountain and Pinhatt to the Clay Tunnel near Tuyen Lam Lake, with 5,570 m of climbing and a 29-hour limit.

Edition note: 100K entries are open until 11:59 PM (GMT+7) on December 25, 2026, or until full; the 50K and 20K are closed. The homepage and UTMB calendar give the event as January 7–10, 2027, while the entry page and UTMB’s announcement say January 8–10; every race starts on Saturday, January 9. The race header and details table checked on October 23 now agree on 101.5 km and 5,570 m of climbing, replacing the earlier conflicting figures. The 100K GPX was last updated on October 19, 2026. UTMB Live had no 2027 page on October 20.

Montane Winter Spine Race

Edale to Kirk Yetholm, United Kingdom · Mountain

A non-stop January race along the full 268-mile Pennine Way from Edale to Kirk Yetholm, with about 10,700 m of climbing, five checkpoints and a 156-hour limit.

Edition note: Entries for 2027 opened at noon UK time on February 4, 2026, through a virtual queue, with a waitlist once places are filled. On October 20, 2026, the race page said “Check back soon for entry details” and the public 2027 roster showed no names, so current availability could not be verified from those public pages. The entry fee is £1,345. The 2027 time limit is 156 hours; the 2025 race pack gave 168 hours. The 2027 live tracking link had not been posted.

Terra de Gigantes

Torre, Serra da Estrela, to Nazaré, Portugal · Mixed

A 306.8 km self-navigated non-stop race across Portugal from Torre, the highest point of Serra da Estrela, to Nazaré on the Atlantic, with eight support bases and a 74-hour limit.

Edition note: Registration is open on STOP and GO until the places sell out or December 31, 2026. On October 20 the current price was €630 (lot 3) and the entry list showed 71 names. The Portuguese event page now gives 306.8 km and +8,214 m, matching its support-base table. The English page still gives 303.8 km and +10,815 m; other older figures also remain in circulation. Check-in hours and the awards time also differ between the Portuguese and English pages, and the Portuguese regulations prevail. The organizer had not published a live tracking link on October 20.

Coldwater Hundred — 100 Mile

Estrella Mountain Regional Park, Goodyear, Arizona, USA · Desert

A 101.3-mile desert loop race at Estrella Mountain Regional Park, combining two shorter red loops and three longer blue loops with a 32-hour cutoff.

Edition note: The 2027 event page was current at review but still linked the 2026 runner guide.

Cretan Backyard Ultra

Voritsi village square, Heraklion, Crete, Greece · Mixed

A backyard ultra based in Voritsi, Crete, with alternating daytime and nighttime routes and hourly starts until the last runner completes a final solo yard.

Edition note: Registration is open for January 16, 2027. The event banner spans January 16–17, but the rules give no fixed finish. Use the 10:00 AM start in the dated 2027 instructions; the older route page still says 11:00 AM.

HURT 100-Mile Endurance Run

Honolulu, Oʻahu, Hawaii, USA · Trail

Five 20-mile laps of rooty, muddy rainforest single-track in the mountains above Honolulu, with about 24,500 ft of climbing, 20 stream crossings and a 36-hour limit.

Edition note: Entry is closed. The 2027 lottery was drawn on August 8, 2026, and the selected runners and three category waitlists are posted on hurt100.com. Waitlisted runners can still be invited until December 31, 2026. Every entrant and waitlisted runner must submit eight hours of verified trail work by November 17, 2026. Runners who withdraw by November 17 get 50% back only if a waitlisted runner takes the place; after that there are no refunds, and entries cannot be transferred or deferred. The 2027 tracking and live-timing links had not been posted on October 20, 2026.

Spartanion Tel Aviv 24-Hour

Hayarkon Park, Tel Aviv, Israel · Road

Israel's national 24-hour championship on a fast paved loop in Hayarkon Park, with qualifying standards for the headline race.

Arc of Attrition 100M

Coverack to Perranporth Airfield, Cornwall, United Kingdom · Trail

A winter coastal ultra along Cornwall’s South West Coast Path, from Coverack to Perranporth Airfield, with 173 km, 5,507 m of climbing and a 37-hour limit.

Edition note: The organizer lists registration open for 2027. The published course closure is Sunday, January 24 at 2:30 AM; follow your assigned wave and the official checkpoint limits. No race-day registration or waiting list is offered.

Hong Kong 100

Hong Kong · Mountain

A 100 km mountain-trail race through Hong Kong's beaches, country parks, steep ridgelines, and extensive trail network.

M*A*S*H Backyard Ultra

Queen Elizabeth Park, Mackays Crossing, Kāpiti Coast, New Zealand · Mixed

A backyard ultra in Queen Elizabeth Park on the Kāpiti Coast, north of Wellington, on a 6.71 km loop of paddock, coastal trail and ex-farm track over Wellington Anniversary Weekend.

Edition note: The third edition starts at 9:00 AM on Saturday, January 23, 2027. Entry opened on July 1, 2026, through eventplus and is limited to 150. Adult entry is $150; under-18 entry is $90 by email request. Until midnight on December 31, 2026, a withdrawn entry can be credited or transferred; until midnight on January 15, 2027, transfer only, both with an admin fee. The organizer says a live leaderboard link will be announced. Big’s race page labels the race “Bronze”.

Saguaro Showdown Backyard Ultra

Usery Mountain Regional Park, Mesa, Arizona, USA · Mixed

A January backyard ultra at Usery Mountain Regional Park in Mesa, Arizona, with a 4.1667-mile trail loop by day and a road out-and-back from 8:00 PM.

Edition note: The fourth edition. Registration is open on UltraSignup and closes at 11:59 PM MT on Friday, January 8, 2027. Big's race page lists the category as "Bronze" and gives Phoenix as the location; the race is held at Usery Mountain Regional Park in Mesa. The ruck loop is 2.3 miles on UltraSignup, while Big's page gives 2.25 and 2.5 miles.

Arrowhead 135

International Falls to Tower, Minnesota, USA · Trail

A 135-mile winter race on the Arrowhead State Trail from International Falls to Tower, Minnesota, on foot, bike or skis, with mandatory survival gear, three checkpoints and a 60-hour limit.

Edition note: The 23rd Arrowhead runs January 25–27, 2027. Applications opened on UltraSignup at 8:00 AM Central on September 1, 2026, and on October 20 UltraSignup showed registration closed since October 10, 2026; the entrant list is hidden. The organizer's rules page is headed 'for 2027' but still gives the previous year's gear-check and start dates (Saturday January 24, Sunday January 25, Monday January 26), so confirm the 2027 race-week times in the racer information. UltraSignup lists the start as 7:00 AM Monday, January 25, 2027. The 2027 Trackleaders tracking page had not been posted on October 20.

Last Soul Ultra World Series: USA Qualifier

United States (venue TBA)

Qualifier 01 of Last Soul Ultra’s 2027 World Series: a 200-athlete backyard ultra in the United States in February 2027, sending its top 15 overall and top 5 women to the Finals in Germany.

Edition note: Last Soul has announced only the month and country. Entry requests close November 1, 2026, and the LSU team selects all 200 athletes; the organizer’s event data lists a €200 entry fee. Its entry link is labeled “lsu-2027-tennessee”, but no venue has been announced.

Tarawera Ultra-Trail TMiler

Rotorua, New Zealand · Trail

Tarawera's longest race starts at Te Puia in Rotorua, taking runners through the region's forests and lake country over 163 km.

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.

Southern Lakes Ultra

Central Otago to Queenstown, New Zealand · Mountain

A six-stage journey of roughly 250 km through Central Otago's lakes, mountains, valleys, forests, and gold-mining country to Queenstown.

Ultra ASIA Race

Mai Châu, Vietnam · Mountain

A four-stage, self-supported 160 km race through the mountains and rice-growing valleys of northwest Vietnam near the Laos border.

Capital Backyard Ultra

Lorton, Virginia, USA · Mixed

A high-level backyard ultra at Meadowood Special Recreation Management Area, built for deep performances in a small, highly supported field.

Edition note: The registration page confirms March 20, 2027 at 8:00 AM. One paragraph of the main website instead says March 27. Entry is selective and requires prior ultra experience.

Arizona Monster 300

Patagonia to Superior, Arizona, USA · Desert

A 300.5-mile journey from Patagonia to Superior through Arizona’s Sonoran Desert and mountain terrain, with 19 aid stations and a 150-hour limit.

Edition note: The 2027 race runs March 29–April 4 in reverse, from Patagonia to Superior: 300.5 miles with about 32,386 ft of climbing and a 150-hour limit, per the 2027 runner manual.

Delirious WEST 200 Miler

Northcliffe to Albany, Western Australia, Australia · Trail

A 347 km (215-mile) point-to-point on Western Australia's Bibbulmun Track, crossing tall forests, coastal scrub, dunes, beaches, and ocean cliffs.

Last Soul Ultra World Series: UK Qualifier

United Kingdom (venue TBA)

Qualifier 02 of Last Soul Ultra’s 2027 World Series: a 200-athlete backyard ultra in the United Kingdom in April 2027, sending its top 15 overall and top 5 women to the Finals in Germany.

Edition note: Last Soul has announced only the month and country. Entry requests run from November 1, 2026 to January 1, 2027, and the LSU team selects all 200 athletes; the organizer’s event data lists a €200 entry fee.

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.

Atacama Crossing

San Pedro de Atacama, Chile · Desert

A six-stage, 250 km self-supported race through the Atacama Desert's rock canyons, salt flats, and high-altitude valleys.

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.

Bradshaw Brute 100

Black Canyon City to Prescott, Arizona, USA · Mountain

A distinct 99.9-mile point-to-point race within Cocodona race week, climbing from Black Canyon City through Crown King to Prescott with a 38-hour cutoff.

Edition note: The 2027 date, cutoff and elevation figures are now labeled for 2027. The surface-percentage table still carries a 2026 label.

Cocodona 250

Black Canyon City to Flagstaff, Arizona, USA · Mountain

A 253.5-mile point-to-point journey through central and northern Arizona, linking desert, historic towns, red rock country, and Flagstaff within a 125-hour limit.

Edition note: The organizer’s page checked October 23, 2026 now labels its course figures for 2027: 253.5 miles, 38,943 ft gain and 34,039 ft loss. Distance and routing remain subject to permitting.

BPN Go One More Ultra

Bare Ranch, Liberty Hill, Texas, USA · Trail

Bare Performance Nutrition’s backyard ultra on Nick Bare’s Texas ranch: a 4.2-mile loop every hour until one runner is left, with 150 places filled by lottery.

Edition note: The 2027 race starts at noon Central on Friday, May 21, the date on BPN’s race page and its Race Roster listing. The lottery closed at 11:59 PM CDT on October 23, 2026, and BPN scheduled the selection announcement for October 28 on YouTube. Big’s race page and Yardlore still list Saturday, May 1, 2027 in Round Rock with 175 places, which does not match the organizer’s pages.

Last Soul Ultra World Series: Australia x DCG Qualifier

Australia (venue TBA)

Qualifier 03 of Last Soul Ultra’s 2027 World Series, run with Dead Cow Gully’s organizer: a 200-athlete backyard ultra in Australia in June 2027, sending its top 15 overall and top 5 women to the Finals in Germany.

Edition note: Last Soul lists the race as “AUSTRALIA x DCG”; DCG is the abbreviation the Dead Cow Gully organizer uses for its own races. BackyardUltra.com.au lists the next Dead Cow Gully for June 19, 2027, but neither organizer has confirmed a date or venue. Entry requests run from December 1, 2026 to February 1, 2027, and the LSU team selects all 200 athletes.

Sixdaysrun Freudenstadt-Grüntal

Freudenstadt-Grüntal, Germany · Mixed

A new six-day race in the Black Forest, using a mostly paved, gently rolling out-and-back course in Freudenstadt-Grüntal.

Edition note: The organizer announces the first edition for June 20–26, 2027. Later starts are possible at noon, but all entrants share one overall classification.

Tahoe 200

Lake Tahoe, California/Nevada, USA · Mountain

A 200.4-mile loop course around the Lake Tahoe region, using high-elevation mountain terrain, 12 full aid stations, and a 105-hour cutoff.

Western States 100

Olympic Valley to Auburn, California, USA · Trail

A 100.2-mile point-to-point race from Olympic Valley through the Sierra Nevada and foothill canyons to Auburn, with qualification and lottery entry.

Taiping 24 Hour

Taiping, Perak, Malaysia · Road

A fixed-time festival at Taiping Lake Gardens with 24-, 12-, 6-, and 3-hour challenges. The organizer’s finisher rules describe a 3.3 km endurance loop and require 40 laps (132 km) for 24-hour finisher status.

Hardrock 100

Silverton, Colorado, USA · Mountain

A high-altitude loop through Colorado's San Juan Mountains from Silverton, with the 2027 edition running counterclockwise and allowing 48 hours to finish.

Cascade Crest 100

Easton, Washington, USA · Mountain

A mountain 100-miler from Easton, Washington. For 2027 the organizer expects an alternate out-and-back route because of damage from the 2026 Three Queens Fire.

Edition note: The course classification reflects the organizer’s expected 2027 alternate out-and-back. It remains provisional; the final route and cutoff schedule have not been confirmed here.

Last Soul Ultra World Series Finals

Germany (venue TBA)

The qualification-only final of Last Soul Ultra’s 2027 World Series, in Germany in August 2027, for the top 15 overall and top 5 women from each of four qualifying races.

Edition note: Last Soul has announced only the month and country. There is no entry request: places go to the top 15 overall and top 5 women, ties included, from the 2026 Last Soul Ultra and the three 2027 qualifiers.

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.

Ultra X Rwanda

Ruhondo and Musanze, Rwanda · Mixed

A two-stage, 110 km race through northern Rwanda's volcanic foothills, twin lakes, jungle valleys, and coffee and banana fields.