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Header UTMB World Series

A UTMB World Series Event

The ultimate global trail running world series

UTMB® World Series is the world’s ultimate trail running circuit that unites the sport’s biggest stars and amateur runners through the best, leading international events in the most stunning locations.

Header UTMB World Series

Experience the UTMB adventure across the world

Built on a passion for the mountains with sustainability at its heart, UTMB® World Series gives all trail runners the chance to experience the UTMB® adventure across the world.

It is the only place where runners can begin their quest to UTMB® Mont-Blanc and the UTMB® World Series Finals.


As of 2022, the UTMB® World Series will integrate different levels of events.

UTMB World Series 2022 confirmed Events

Program UTMB World Series

Race Categories

There are 4 UTMB World Series race categories including 20K, 50K, 100K and 100M.

20K UTMB World Series

The most accessible format

Perfect for outdoor enthusiasts looking for a first trail running experience or for trail runners who want to challenge themselves or train on short distances.

50K UTMB World Series

The challenging adventure

Fans of medium distances ranging between 50 and 100 km-effort, the 50K category is for you! The Finals of the 50K category will be held each year at the OCC race of UTMB Mont-Blanc.

100K UTMB World Series

The pathway to ultra endurance

A unique way to test yourself over 100 km-effort and experience a full day on the trails, with the epic CCC race of UTMB Mont-Blanc becoming the Finals of the 100K category.

100M UTMB World Series

The mythical distance

Push your limits and achieve the ultimate trail running dream of completing a race of over 170 km-effort. The pinnacle UTMB race of UTMB Mont-Blanc becomes the Finals of the 100M category.

Running Stones

Collecting Running Stones is the only way to access the UTMB World Series Finals for regular runners.

What is a Running Stone ?

What is a Running Stone ?

A Running Stone is an entry into the lottery to participate in the UTMB World Series Finals: the UTMB, CCC and OCC races of the UTMB Mont-Blanc.

Only 1 Running Stone acquired in the past two years is mandatory to enter the lottery. Running Stones are cumulative, have no expiration date, and each Running Stone gives you an additional chance to be drawn.

How do I earn Running Stones ?

You can only collect Running Stones by finishing races in the 20K, 50K, 100K or 100M category at a UTMB World Series Event or UTMB World Series Major.

Discover the 25 events that will allow you to collect Running Stones in 2022 to enter the UTMB Mont-Blanc lottery from 2023 onwards.






UTMB Index

Only accessible on this website, the UTMB Index provides the performance level of each runner.

How do I get a valid UTMB Index ?

A valid UTMB Index is achieved by completing at least one race of the UTMB World Series or a UTMB Index race in the relevant category within the previous 24 months. Once a race category has at least 1 valid result, all races from the past 36 months will be used to calculate your UTMB Index.

To enter the UTMB Mont-Blanc lottery for the race of your choice, you must have a valid UTMB Index as per the chart.

How do I get a valid UTMB Index ?

Elite runners

Under the new sports system, elite runners must qualify for the UTMB World Series Finals.