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What is the UTMB Race? Everything You Need To Know About This Epic Ultramarathon

So you’re thinking about running UTMB, or are curious to learn what the famous UTMB trail race is all about? You’ve come to the right place! In simplest terms, the UTMB, or Ultra-Trail du Mont Blanc is a famous ultramarathon running race in Europe, starting and finishing in Chamonix, in the French Alps. The UTMB trail race involves around 106 miles (107km) of running and a circumnavigation of Mont Blanc, the highest mountain in Western Europe.

How many people run the UTMB?

Around 2,300 people run the UTMB race itself. However, In addition to the headline UTMB race, the event also includes six other endurance races, most of which are also ultramarathons ranging in distance from 53km (the OCC) to 300km (the PTL). In total, around 10,000 people run over the course of the event week.

When does UTMB take place?

The UTMB is held around the last week of August / first week of September each year.

Chamonix - Trail & Kale - Photography by Alastair Dixon

What are the other UTMB races?

The other UTMB ultramarathon races held during the race week are:

  • TDS – “Sur les Traces des Ducs de Savoie” – 145km and 9,100m ascent – point-to-point from Italy to France
  • CCC – Courmayeur-Champex-Chamonix – 101km and 6,100m ascent – point-to-point from Italy to France, via Switzerland
  • OCC – Orsieres-Champex-Chamonix – 55km and 3,500m ascent, point to point from Switzerland to France
  • PTL – Petit Trotte a Leon – 300km and 25,000m of ascent, this is a non-competitive event, in teams of 2-3 people who are self-supported

There are also two other races, YCC and MCC, which are shorter races for youngsters and volunteers/local community members respectively.

Why is the UTMB race so famous?

The UTMB ultramarathon is famous because it is a huge challenge, held in a trail running mecca along a well-known hiking route.

As it is recognized as one of the toughest foot races in the World, each year we see it gaining in popularity, especially with runners traveling from overseas.

What is the elevation gain at UTMB?

During the 106 miles / 170km of running, UTMB runners also travel through high elevation passes (2,500m+ / 8,200ft+) and need to be able to manage themselves in changeable mountain conditions, ranging from scorching summer heat to freezing high-altitude precipitation. Elevation gain covers more than 10,000m (c.33,000ft) of climbing and the same descending.

Trail running in Chamonix

How long does the UTMB race take to complete?

In addition to time barrier cut-offs during the race, runners have up to 46h30 to complete the race. Most people can expect to be out on the course over two nights, as the race starts at 6pm on the first night. The fastest finishers can complete the course in less than 21 hours!

It’s also worth noting that due to the level of difficulty, the drop-out rate (percentage of people not finishing) can be up to around 40% of starters. This rate is particularly high in years with bad weather (cold, wet and stormy) and really hot years.

Can I have a pacer at UTMB?

Pacers are not permitted for the UTMB. In general, pacers are pretty uncommon in European races, unlike in the US where pacers are often permitted on 100 mile race courses.

How do I run the UTMB race?

Hold your horses! Due to the size of the challenge and the number of people wanting to run this race, in order to qualify you need to complete a certain number of challenging ‘qualifying races’ to accumulate sufficient points and experience before being able to apply for a place via UTMB’s lottery system.

What do I need to wear and carry for UTMB?

The UTMB race has a list of mandatory kit. The list of requirements may change between years and even on race-day, depending on anticipated weather conditions, but we definitely recommend you invest in a good hydration pack, headlamp, waterproof jacket, hiking poles and of some great trail running shoes.

best trail running gear ultimate trail running gear guide trail and kale

If you want to get the best trail running gear for this race (or another similar race) check out our Ultimate Trail Running Gear Guide.

What are the UTMB qualifying races?

UTMB qualifying races are all trail races that offer a varying number of ITRA points on completion (and some need to be completed within a certain time limit to count). There are a lot of options on every continent to enable you to accumulate enough points, but note that if you need say 10 points to enter the UTMB lottery, you need to acquire them from only two races, ie two races that give you either 5+5 or 4+6 points – you can’t run 5x easier 2-point races and still apply for a UTMB bib 🙂

How does the UTMB points system and lottery work?

The UTMB race uses ITRA points for determining if runners are eligible to enter a lottery to obtain a bib for one of their races. It’s best to check the organizer’s website for the latest details on how to accumulate points, which races offer points, and how many points are needed for your chosen UTMB distance.

The qualifying races and number of points they offer can change each year so we recommend keeping an eye on the organizer’s site for the most accurate information. There’s also a handy points-checker on their site, where you can enter your name and date of birth and see how many ITRA points you have accumulated to date.

Other challenging European ultramarathons like UTMB

If you like the sound of the UTMB but would prefer a race that is a little different (and less famous) without spending a couple of years accumulating points for the lottery, then have a read of our blog post on ‘Alternatives to UTMB‘ for some ideas and suggestions Also you can also browse our Events & Races category for loads more trail race inspiration!


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Helen Dixon
Helen Dixonhttps://www.trailandkale.com
Hi, I’m Helen. I write about all things trail running, outdoor adventures and mindful living. Aiming to be a positive influence and have a positive impact on the environment and those around me.
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