UTMB Lottery and Running Stones: How Entry Actually Works

The UTMB lottery and Running Stones system explained: index requirements per race, how stones are weighted and decay, and the strategies that improve odds.

The UTMB lottery confuses more runners than any other entry system in the sport, and it is not because people are slow. It is because UTMB changed from a points system to a Running Stones system, kept a separate performance index, layered a lottery on top, and then adjusted the weighting rules more than once. If you have ever asked whether your 2024 finish still counts, or why someone with fewer stones got in ahead of you, this guide untangles it. Here is what a Running Stone is, how the draw actually weights them, and what you can realistically do to improve your odds.

The three separate things you need

These get conflated constantly, and they do different jobs.

1. The UTMB Index. A performance rating derived from your results at UTMB World Series races, expressed by distance category: 20K, 50K, 100K, and 100M. It is a qualification gate, not a lottery ticket. You need an index at the right distance category to be eligible for a given race.

2. Running Stones. These are your lottery tickets. You earn them by finishing UTMB World Series events, and they are what the draw actually weights.

3. The lottery itself. A weighted random draw among eligible applicants, run each winter for the following August.

You need all three lined up: a valid index at the right distance, at least one active Running Stone, and a successful draw.

How Running Stones work

Stones are awarded for finishing a UTMB World Series event within the qualifying window. The number scales with race distance and category:

  • Shorter World Series races award fewer stones, longer ones award more, across a range of roughly one to four
  • The three UTMB World Series Majors double the stone count for the same distance
  • Bonus stones are available for finishing in the upper part of the field at flagship events

Stones expire. A stone earned two seasons ago still counts toward entry but carries less weight in the draw than a recent one, so the system rewards runners who are currently active in the series rather than those who banked results years ago (Running Lookout, 2026).

Index requirements by race

  • OCC: requires an index from a 20K category race
  • CCC: requires an index from a 50K category race
  • UTMB: requires an index from a 100K or 100M category race

Getting this wrong is the single most common reason applications are rejected. A runner with a strong 50K index cannot enter UTMB itself, no matter how many stones they hold (UTMB Mont-Blanc, 2026).

How the UTMB lottery draw weights your stones

The lottery is weighted, not proportional in a simple way. More stones means more chances, but the relationship is not linear and the weighting decays with the age of each stone.

Two adjustments matter in practice:

Consecutive unsuccessful applications. Applying and missing out improves your standing in subsequent years, in the same spirit as the Western States ticket system.

The responsible mobility commitment. Runners who opt into UTMB's low-carbon travel commitment during pre-registration receive a meaningful boost to their odds, reported at around 30% (UTMB, 2026). If you are travelling from within Europe by train, this is free odds.

What this means for your strategy

Chasing stones by entering many short World Series races is less efficient than it looks, because short races award fewer stones and still cost entry fees and travel. Two better approaches:

  • Run one Major at a longer distance, which doubles the stone yield for the same effort
  • Run a 100K or 100M World Series race that both sets your index at the right category and yields a strong stone count in one go

The calendar you need to work to

The rhythm repeats annually, though exact dates shift:

  • Through the year: run World Series events to earn stones and set your index
  • Late autumn to early winter: pre-registration opens for the following August's races
  • Winter: the draw takes place and results are published
  • Immediately after: successful applicants confirm and pay, and there is usually a short window for this
  • Spring: any released places are redistributed

Miss the pre-registration window and no amount of stones helps you. Put the date in your calendar the year before.

The Mont-Blanc week itself runs in late August, with UTMB starting Friday evening from Chamonix. For 2026, the flagship race covers 174 km with around 9,900 m of climbing and a 46 hour 45 minute limit, while CCC covers 101 km with 6,050 m and a 26 hour 30 minute limit, and OCC runs 60 km with roughly 3,500 m and a 14 hour 30 minute limit.

Realistic odds and alternatives

Demand consistently outstrips places across all three Chamonix races. Treat entry as a multi-year project rather than a plan for next summer.

Routes that bypass the lottery:

  • Elite entry. A high enough UTMB Index earns direct entry for a limited number of runners
  • Charity places. Available in limited numbers, with a fundraising commitment
  • Tour operator packages. Some travel partners hold allocated places, bundled with accommodation and at a premium
  • UTMB World Series Finals qualification. Winning your category at certain events can earn direct entry

Or run something else. The Alps are full of races with comparable terrain and no lottery. Our guide to trail running destinations in Europe covers alternatives, and the CCC and OCC guide covers the sister races in detail.

While you wait, build the right fitness

The multi-year entry timeline is an advantage if you use it. UTMB rewards sustained climbing ability and descending durability far more than flat speed, and those adaptations take years rather than months.

Trailia's Race Predictor will give you an honest finish estimate against the actual Mont-Blanc profile, which is a useful reality check well before you have a bib. The Race Readiness check shows whether your current block is building the vertical the course demands. Our UTMB training plan guide covers the specific build.

Key takeaways

  • You need three things: a valid UTMB Index at the right distance, at least one active Running Stone, and a successful draw
  • Index category gates which race you can enter, and getting it wrong is the most common application error
  • Stones decay in weight over time, so recent results count for more than banked ones
  • Running one Major at a longer distance yields more stones than several short races
  • Opting into the responsible mobility commitment raises your odds by roughly 30% at no cost

Where to go from here

Work backwards from the race you want. Confirm which index category it requires, pick a single World Series event that delivers both that index and a strong stone haul, and put the pre-registration window in your calendar now. Then treat the waiting years as training years rather than dead time.

Trailia builds elevation-aware plans for exactly this kind of multi-season project, adapting as your fitness and race calendar change.

Citations

  • UTMB Mont-Blanc (2026). Registration Conditions, HOKA UTMB Mont-Blanc.
  • UTMB World (2026). UTMB Index and Running Stones documentation.
  • iRunFar (2026). UTMB World Series coverage and entry analysis.
  • Running Lookout (2026). UTMB Running Stones explained: how the 2026 Mont-Blanc lottery works.

Frequently Asked Questions

What is a UTMB Running Stone?

A Running Stone is a lottery ticket earned by finishing a UTMB World Series event within the qualifying window. The number awarded scales with race distance and category, typically ranging from one to four, and the three World Series Majors double that count. You need at least one active stone to enter the lottery at all.

How is the UTMB lottery weighted?

More stones give you more chances, but the relationship is not simply proportional and each stone's weight decays as it ages. Consecutive unsuccessful applications also improve your standing in later years. The system deliberately favours runners currently active in the World Series over those who banked results several seasons ago.

What UTMB Index do I need for each race?

OCC requires an index from a 20K category race, CCC requires a 50K category index, and UTMB itself requires a 100K or 100M category index. Getting this wrong is the most common reason applications are rejected. A strong 50K index will not make you eligible for the flagship UTMB race.

Is the UTMB Index the same as Running Stones?

No, and confusing the two causes most of the frustration with this system. The index is a performance rating that gates which races you are eligible to enter, while stones are the lottery tickets that determine your chances in the draw. You need both, plus a successful draw.

How can I improve my UTMB lottery odds?

Opt into the responsible mobility commitment during pre-registration, which reportedly raises your odds by around 30% at no cost. Prioritise running one World Series Major at a longer distance over several short races, since Majors double the stone yield. Applying every year also builds your standing over time.

Do old Running Stones still count for the UTMB lottery?

Stones earned in earlier seasons can still count toward entry, but their weight in the draw decreases the older they get. This means a recent finish is worth more in the lottery than an equivalent result from two years ago. Staying active in the series is the point of the design.

When does the UTMB lottery open and close?

Pre-registration typically opens in late autumn or early winter for the following August's races, with the draw taking place over winter. Successful applicants then have a short window to confirm and pay. Missing the pre-registration window means no amount of stones will help, so put the date in your calendar a year ahead.

How can I get into UTMB without the lottery?

A high enough UTMB Index earns direct elite entry for a limited number of runners. Charity places are available with a fundraising commitment, and some tour operators hold allocated places bundled with accommodation at a premium. Winning your category at certain World Series events can also earn direct entry.

How long are the UTMB races and what are the cutoffs?

The flagship UTMB covers 174 km with around 9,900 m of climbing and a 46 hour 45 minute limit. CCC is 101 km with 6,050 m of gain and a 26 hour 30 minute limit, while OCC covers 60 km with roughly 3,500 m and a 14 hour 30 minute limit. All three finish in Chamonix during the late August race week.

How many years does it usually take to get into UTMB?

Demand consistently exceeds places across all three Chamonix races, so treat entry as a multi-year project rather than a plan for next summer. Many runners apply for several consecutive years before being drawn. The upside is that the waiting years are exactly the time needed to build the climbing and descending durability the course demands.

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