UPCOMING EVENTS IN OCTOBER 2025
Chihuahua by UTMB®: the land of the Rarámuris, the first ultra-runners
From 2 to 4 October, the 3rd edition of Chihuahua by UTMB® – its first as part of the UTMB World Series – will bring together more than 1,800 participants, joined by nearly 200 Rarámuri athletes, the guardians of local traditions. Strong local roots are evident with 86% of runners from Mexico, including 21% from the State of Chihuahua. Women make up 37% of the field – a figure in line with the Latin American regional average.
On the sporting front, Victor Larocque (CAN, UTMB Index 773) and Elena Ormon (USA, UTMB Index 642) will headline the Rarámuri 100M, while Julián Vinasco Marin (COL, UTMB Index 788) tackles the Wériga 100K. Local athletes Moises Martinez Peralta (MEX, UTMB Index 818) and Josefina Pérez (MEX, UTMB Index 692) will contest the Akáa 59K, alongside Frida Cervantes (MEX, UTMB Index 608) in the Komakali 37K. Former professional cyclist Tony Baca, from Chihuahua, will make his trail-running debut on the Akáa 59K.
Off the trails, Chihuahua by UTMB will showcase Rarámuri heritage with two traditional ball games – collective endurance contests handed down through generations. In partnership with the True Messages association and supported by UTMB Cares, the event also strengthens its cultural and social commitments: launching a programme to promote women in trail running; awarding finisher medals and gifts handmade by Rarámuri artisans; supporting local races with entries and equipment; and ensuring equal participation for men and women. Young talent will also be encouraged with equal prizes for girls and boys in the children’s races – combining sporting excellence with cultural celebration and community engagement. Find out more.
HOKA Kodiak Ultra Marathons by UTMB®: the American Major in the Californian mountains
From 9 to 11 October, the HOKA Kodiak Ultra Marathons by UTMB® will take place at Big Bear Lake, California, for its first edition as the American Major on the UTMB World Series circuit. More than 2,500 runners are expected across five distances (100M, 100K, 50K, 20K and 10K), set against the spectacular backdrop of the San Bernardino Mountains.
With 75% of the field from the USA, including 41% from California, the event combines strong local roots with a high-calibre international line-up. Women make up 35% of participants – above the circuit average – rising to 60% in the 10K. This year, 32 athletes from the Los Angeles-based Renegade collective, supported by HOKA and dedicated to promoting women’s trail running, will race alongside elite competitors and community runners. Among the standouts on the start line: Claudia Tremps, Jonathan Rea, Hayden Hawks, and Caleb Olson, fresh from his victory at the Western States® 100-Mile Endurance Run.
As a Major, HOKA Kodiak Ultra Marathons by UTMB will award double Running Stones and offer direct qualification for the 2026 UTMB World Series Finals.
The event will be streamed on UTMB Live and broadcast worldwide via L'ÉQUIPE, Outside, DAZN, iQIYI, and Eurovision Sport, promising a weekend of world-class trail running.
Read the pre-event press release.
Find out more.
TransJeju by UTMB®: the volcanic heartbeat of South Korea’s trail-running
From 17 to 19 October, nearly 5,000 runners will gather for the 3rd edition of TransJeju by UTMB® on South Korea’s volcanic Jeju Island. With 63% of the field from Korea and 96% from across Asia, the event has established itself as a major meeting point for the region’s trail-running community. Women account for 33% of participants overall, rising to 46% for the 20K – clear evidence of growing female participation.
Four race formats (100M, 100K, 50K and 20K) will showcase Jeju’s dramatic landscapes with its volcanic peaks, lush forests, and sweeping views of the ocean. Rooted in local tradition, trophies will be sculpted from volcanic lava in the form of statuettes inspired by the Dol Hareubang, Jeju’s iconic ‘stone grandfathers’.
The event will be streamed on UTMB Live and broadcast internationally via L'ÉQUIPE, Outside, DAZN, iQIYI and Eurovision Sport. Find out more.
Ultra-Trail Ninghai by UTMB®: an epic adventure in eastern China
From 17 to 19 October, eastern China will welcome the Ultra-Trail Ninghai by UTMB®, founded in 2013 and part of the UTMB World Series since 2023. Three race formats (100K, 50K and 20K) are on the programme, attracting around 4,500 runners from across China and neighbouring countries each year.
The routes lead participants through stunning landscapes – from bamboo forests and steep mountain ascents to stream crossings and trails bordered by ancient temples and shrines. Find out more.
Trail of the Kings – Lake Toba by UTMB®: a first for Indonesia
From 17 to 19 October, Indonesia will host its first UTMB World Series event with the inaugural Trail of the Kings – Lake Toba by UTMB®. Six race formats (100K, 50K, 20K, 10K, 5K and a children’s race) will bring together participants from across the Indonesian archipelago, 82% of them from the host nation and mainly North Sumatra.
The courses will lead runners through volcanic craters and dense forests on Samosir Island, along ridgelines overlooking Lake Toba – the world’s largest volcanic lake – and through traditional Batak villages.
Off the trails, a Batak cultural festival will showcase Solu Bolon canoe races, Sigale-gale dances, and the rhythms of Tor-tor and Margondang. Local residents, volunteers and institutions are rallying around Trail of the Kings – Lake Toba by UTMB®, driving meaningful initiatives such as planting 1,000 trees, hosting traditional ceremonies, engaging villages along the route, supporting local sports associations, and working alongside the Samosir district government. Find out more.
Mallorca by UTMB®: the Mediterranean UTMB World Series experience
From 31 October to 2 November, the 2nd edition of Mallorca by UTMB® will welcome 2,400 runners onto the trails of the Serra de Tramuntana, a UNESCO World Heritage site. Women represent 23% of the overall field across the four distances (100M, 100K, 50K, 20K), rising to 37% in the 20K.
In the heart of the Mediterranean, the event offers striking contrasts: dramatic sea cliffs, oak and pine forests, and rugged summits – making it one of the most diverse courses on the circuit.
Off the trails, local engagement is front and centre. Twenty-five Charity Bibs will support the Fundació Social La Sapiència, which promotes social inclusion through scholarships and agricultural training at the Santuari de Lluc, while also funding trail restoration and ecosystem conservation. These initiatives foster professional integration and help preserve the Serra de Tramuntana’s traditional agricultural landscape. Find out more.
Kullamannen™ by UTMB®: trail running on Sweden’s wild coast
From 31 October to 1 November, Kullamannen by UTMB® will bring together more than 3,000 runners, nearly two-thirds from Sweden, with strong contingents from Denmark and Norway – a sign of the event’s popularity across neighbouring countries.
The 2025 courses have been redesigned: the 100M now features a new aid station before the final 50km and an extra supporter access point, while the 20K and 50K routes move closer to the coast for even more spectacular cliffside and seaside views.
Off the trails, ‘Hoganas Week’ in the host town of the 100M and 100K will bring the event to life with markets, family activities, and community spaces around the start line. The event also strengthens its sustainability commitments, featuring a children’s race organised by local clubs and a unique finisher gift made locally from recycled plastic and designed to support post-race recovery. Find out more.
