Trail de la SibérieRegister
Trail de la Sibérie runners during the night race

19 & 20 February 2027 · Profondeville

ULTRA
CRAZY

Two days. Two starts. One challenge.

Run a night race on Friday, come back to the start line on Saturday and experience the Trail de la Sibérie all the way to the end of the weekend.

See the four formats See all races
FridayA night raceFirst start
SaturdayA trail runSecond start
Challenge4 formules50 to 125 km
Weekend2 days19 & 20 February 2027
01FridayNight race
+
02SaturdayTrail & ultra
=
Ultra CrazyA separate ranking

Four ways to double the challenge

Choose
how far to go.

Three progressive formats make up the challenge. The Ultimate 125 places the 25 km night race before Saturday’s 100 km. The totals shown correspond to the announced cumulative distances.

012-day challenge

Ultra Crazy 50

Friday15 km
+
Saturday35 km

The first level to discover what it is like to combine two races in the same weekend.

Cumulative distance50 km
Cumulative elevation gain2 100 m
022-day challenge

Ultra Crazy 70

Friday19 km
+
Saturday52 km

A demanding night race, followed by a 52 km long trail on Saturday.

Cumulative distance71 km
Cumulative elevation gain2 700 m
032-day challenge

Ultra Crazy 100

Friday25 km
+
Saturday75 km

One hundred kilometres in total and two finish lines for a no-compromise weekend.

Cumulative distance100 km
Cumulative elevation gain3 600 m
The ultimate format

Ultra Crazy Ultimate 125

The signature format: the longest night race, followed by the 100 km the next day.

Friday25 km
+
Saturday100 km
Cumulative distance125 km
Cumulative elevation gain4 400 m

A separate ranking

Two races.
A dedicated podium.

A separate Ultra Crazy ranking is planned. The ranking conditions, categories and podiums will be specified in the official rules.

Understanding the formats

Before doubling
the stakes.

01How does the Ultra Crazy work?+

You take part in the Friday distance and the Saturday distance included in the chosen format. The conditions for validating the challenge will be specified in the official rules.

02Can I choose a different combination of distances?+

The challenge is based on the four official combinations presented on this page. Other combinations are not included in the Ultra Crazy rankings. You will therefore be ranked normally, like the other runners, in the overall rankings.

03How will the rankings be determined?+

A separate Ultra Crazy ranking will be established. The ranking method, categories and podiums will be specified in the official rules.

04How do I register for the challenge or the relay?+

The registration details, fees and rules will be specified when registration opens.

19 & 20 February 2027

Two starts.
One Sibérie.

Registration opens on 1 October 2026.

Be ready when registration opens
Ultra Crazy · 50 to 125 kmBe ready when registration opens