UT4M race trail training, 3 days


Join Caroline, UIMLA certified mountain guide, trail running during 3 days in the massifs of Vercors, Oisans, Belledonne and Chartreuse, to train for the UT4M!



4 Days

Jul, Aug

Extremely Fit



Are you planning on running the UT4M? This trail running program is ideal to train and get to know the terrain in preparation for the race! 

We will run almost 120km of the UT4M race. We will go to all the key places, reach the summits, practice the technical descents. Besides, I organized this trip with the logistics of a transfer to transport our luggage and help us if necessary.

This is the best way to get prepared for the real race, enjoying the incredible variety of landscapes and the ambiance of Vercors, Oisans, Belledonne and Chartreuse.

The highlights of this trip are:
– A chance to properly get to know the UT4M
– Advice from a professional
– Logistics: transfers, luggage transfer, accommodation, meals

In the ‘extra’ section below, you’ll find information about the required trail running level you need to have. You will also see the equipment that you need to bring with you.

During these 3 days we will run on average 35km a day and go up from 1500 to 2500 meters. We will mainly be on single tracks and technical trails (stone, névé…). We will partially run off trails and be on aerial paths.

Ready to get familiarized with the route of UT4M during 3 intense and rewarding trail running days? Then book this trip and let’s get ready for the real deal! I also offer a similar program but in preparation for the UTMB, check it out here.


Day 1: Vercors section

We meet at 8:30AM at the Grenoble train station. Short transfer to our starting point: the Tour Sans Venin, one of the 7 Wonders of Dauphiné.
Today we will run at Vercors. St Nizier du Moucherotte, le Moucherotte (1901m), Pic St Michel (1966m), Arc pass (1736m), St Paul de Varces and Vif.
The Vercors is a vast plateau surrounded by limestone cliffs huge and majestic.
We finally reach our accommodation, a lodge where we will sleep in comfortable yurts. There is a swimming pool at the lodge!
In the evening we will do some stretching and talk about some nutrition and hydration aspects before, during and after the effort.

Distance: 26km
Min altitude: 368m
Max altitude: 1966m
Total Altitude change +2211/-2126m
Duration: 5-6hs

Day 2: Oisans section

After a short transfer, we reach the Laffrey lake. It’s a different massif with a different ambiance. We enjoy here the lakes and summits of Oisans: Alpe du Grand
Serre (1368m), Arrête de Brouffier (2350m), Poursollet lake(1649m), Fourchu lake
(2068m), and finally the descent to Rioupéroux.
We finish at Bourg d’Oisans and reach the lodge, where you can get a massage or go to the spa (reservation required).
In the evening we will do some stretching and talk about training specifically for trail and ultra-trail.

Distance: 33km
Min altitude: 556m
Max altitude: 2329m
Total Altitude change +2354/-2719m
Duration: 7-8hs

Day 3: Belledonne section

Back to Rioupéroux, we face a wall this morning. It is the incredible ascent to the Arselle plateau: the vertical kilometer of the UT4M! Then the Belledonne massif appears, with lakes and summits: Achard lake (1917m), Croix de Chamrousse (2253m), Roberts lake(1998m), Longet lake (2027m) and Grand Colon (2402m). Then a last long descent to Freydières (1131m) and the Grésivaudan (220m) to end the day.
After a transfer, we reach the Chartreuse, and we spend the night in a 2* hotel at the heart of the Chartreuse Park.
In the evening we will do some stretching and talk about the complete trail.

Distance: 32km
Min altitude: 250m
Max altitude: 2362m
Total Altitude change +2423/-2759m
Duration: 7-8hs

Day 4: Chartreuse section

After a short transfer to St Nazaire les Eymes, we start ascending the Chartreuse, the Emerald of the Alps according to Stendhal.
Through green forests, we traverse the Faïta pass (1425m), Chamechaude (2082m), Porte pass (1327m), Sappey en Chartreuse (1000m), Fort du St Eynard and finally Vence pass (782m).
Transfer to the Grenoble train station, that we reach around 6PM.

Distance: 27km
Min altitude: 455m
Max altitude: 2015m
Total Altitude change +2216/-1850m
Duration: 6-7hs




Lodge and hotel.

More info

Clients are required to have a multi-risk insurance, covering cancellation fees, rescue and accident, repatriation and baggage loss or theft.

(Reconnaissance UT4M)

Level: - Regular practice of running and other activities: 4-5 times / week for at least 1:15h - Regular running in varied terrains - Regular mountain hiking - Experience in mountain trails at least 40km long and 2000m D+, and being able to run at least at 800mD+/h during 1h. - Knowledge of the mountain environment

Equipment: - During the day: a light backpack with a waterproof jacket, a long sleeve warm fleece type, a survival blanket, a whistle, an individual pharmacy kit*, a cap or headband, a hat and thin gloves, sunglasses suitable for running, long tights if you are wearing shorts to run, cereal bars and energy drinks, a plastic bag for waste, biodegradable toilet paper, a headlamp, a minimum reserve water of 1.5L, an elastic strapping strip and some cash - To wear: running short, a short-sleeved t-shirt, running socks and already worn trail shoes - For the whole stay: spare clothes for 3 days, a personal hygiene kit, spare shoes, a spare water socket, spare batteries for the headlamp, a pair of spare laces, a pocketknife and earplugs - Recommended additional equipment: poles, leggings and camera * Individual pharmacy kit: anti-friction cream, sunscreen, double skin dressings, elastic band, paracetamol, anti-diarrheal, antiseptic and personal drugs

Meeting point

At the Grenoble train station. Getting there: - By car, let me know so I can guide you to leave it in a free parking - By train, TGV Grenoble station.


About the guide

I hold the State Certificate of Mountain Leader (UIMLA), Athlete of Team Garmin Adventure. I won many trail competitions such as Oxygen Challenge, The Glaciers Tour of Vanoise, Albertville Trail, Drayes Blanches of Vercors, the Frison Roche Beaufort, Run and skate of Chamonix… I have also some racing podiums such as the Saintélyon, the Lyon Urban Trail, the Causses Marathon, the Allobroges. I am an ex-sportswoman of high level in rowing (World Championships, World Cups, France Championships). I have a mastery STAPS (Sport) and BEES First degree in rowing.
I organise and supervise many trail courses in the Alps with a pro team, a friends group with whom we have a mission: Run and enjoy! I invite you to contact me if you want to train and/or discover these incredible massifs.

What people are saying about Caroline Freslon

Prices per person

Group of 1

EUR 1238 Each

Group of 2

EUR 619 Each

Group of 3

EUR 413 Each

Group of 4

EUR 310 Each

Group of 5

EUR 248 Each

Want a different number of travellers?

Price includes

- Guiding fee


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