Mongolia Sunrise to Sunset

August 13th 2025
Hatgal, Hovsgol
100 KM

Mark your calendars: The 2025 edition of the Mongolia Sunrise to Sunset (MS2S) ultra-trail will take place on August 13, with race week from August 10-16. This will be the 24th edition of the traditional event. The first MS2S took place in 1999, making it one of Asia’s oldest ultra-trails.

Mongolia Sunrise to Sunset is without a doubt one of the world’s most spectacular and remote ultra runs: Taking place in the stunning Hovsgol National Park in Northern Mongolia, the participants of the 42km and 100km ultra-distance pass through fairytale forests and windblown lowlands, climb craggy mountain passes and run along the lakeshore of mighty Lake Hovsgol. Mongolian horsemen serve as race marshals and help at the aid stations, herds of yaks watch the runners passing by.

Participants do not only come to Mongolia for the trail race, but to experience a week filled with adventure. In the days before and after race day, they get in touch with the local nomadic population. The participants sleep in traditional Mongolian Gers and explore the gorgeous wilderness on horseback.

Running for Mother Earth

All proceeds of the charity event are used to fund environmental projects in Hovsgol National Park, in cooperation with Global Nature Fund, as well as to preserve the unique nomadic lifestyle and culture of its population. MS2S race director Nicolas Musy: “Visiting the Hovsgol Lake area is like stepping into a different world. It is a paradise on earth. We work hard to keep the National Park as clean as it is, and to support the inhabitants so they can continue their unique way of life.”

The accumulated elevation gain/loss in the marathon distance is more than 2,200 meters, in the 100km ultra run it is 3,375 meters. Still, everybody with a strong spirit and good training can complete the race. The cut-off time – for both 42km and 100km – is 18 hours. MS2S is a member of the International Trail Running Association ITRA. Finishers of the 100km ultra distance get four UTMB qualifying points. MS2S is also a partner of the Asia Trail Master.

Register now!

The registrations for 2025 are open – early bird race week travel packages are available on www.ms2s.org. The race is limited to 100 participants.

Upcoming Races

Aug 13 2025
100 KM
Out and Back
3 Elevation Rating
Hilly, ~2500-7500 feet in 50 miles
3 Surface Rating
Some rocks, root, and/or ruts

Additional Distances

This event also has the following sub ultra distances

42 KM

Results

100 KM

Date Finishers Top Result (M) Top Result (F)
08/14/24 Results Not Available Submit Results

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