Photo: Daniel VILLAFRUELA · CC BY-SA 4.0 · Wikimedia CommonsTrail RunningUTMB Index Races
Trail Les 40 Bosses
Saint-Leu-la-Forêt, France
December 5, 2026 to December 6, 2026Date confirmed
120 km75 km45 km20 km+1
ForestNature & Off-Road+5
FRTrail Running · Ultra-Trails · Île-de-France Region · 7 Events · 37 Races
Ultra-Trails in Île-de-France Region
7 verified events with 37 individual races (4 confirmed dates) in Île-de-France Region complete with route maps and elevation profiles.
Events74 confirmed dates
Competitions37Races & courses
Distances10 - 162 kmCourse distance range
Max. Elevation Gain+4,900 m D+Course elevation profile
Selected Events
Featured Events & Highlights
Photo: Daniel VILLAFRUELA · CC BY-SA 4.0 · Wikimedia Commons
Photo: gadl · CC BY-SA 2.0 · Wikimedia CommonsTrail RunningNordic WalkingNational Trail Challenge
Ecotrail Paris
Paris, France
March 20, 2027 to March 21, 2027Date confirmed
122.2 km83 km47.5 km35.2 km+3
Culture & HistoryCity Run+4
Photo: Jonathan Beech · CC BY-SA 4.0 · Wikimedia CommonsTrail Running
2T2M
Montmorency, France
March 27, 2027 to March 28, 2027Date confirmed
83.9 km62.5 km44.9 km23.1 km+1
Night RunSeaside & Coast+6
Photo: Fab5669 · CC BY-SA 4.0 · Wikimedia CommonsTrail Running
The Yvelines Diagonal
Breuil-Bois-Robert, France
April 3, 2027Date confirmed
103 km80 km50 km23 km+1
Nature & Off-RoadForest+3
Photo: Daniel VILLAFRUELA · CC BY-SA 4.0 · Wikimedia CommonsTrail Running
Festival des 3 forêts
Mériel, France
Date to be announcedDate TBA
162 km100 km71 km65 km+3
Public ParkNature & Off-Road+5
Photo: gadl · CC BY-SA 2.0 · Wikimedia CommonsTrail Running
Salomon EcoTrail Paris Autumn
Paris, France
Date to be announcedDate TBA
80 km50 km20 km
Public ParkForest+3
Photo: Rémih · CC BY-SA 4.0 · Wikimedia CommonsTrail Running
Ultra Trail du Pays de Fontainebleau
Fontainebleau, France
Date to be announcedDate TBA
87 km
ForestNature & Off-Road+2
Dates & Schedule
Race Calendar
December 2026
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Dec 5, 2026 - Dec 6, 2026 | Trail Les 40 Bosses | Saint-Leu-la-Forêt, Île-de-France, FR | Trail Running | 120 km75 km45 km20 km |
March 2027
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Mar 20, 2027 - Mar 21, 2027 | Ecotrail Paris | Paris, Île-de-France, FR | Trail RunningNordic Walking | 122.2 km83 km47.5 km35.2 km |
| Mar 27, 2027 - Mar 28, 2027 | 2T2M | Montmorency, Île-de-France, FR | Trail Running | 83.9 km62.5 km44.9 km23.1 km |
April 2027
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Apr 3, 2027 | The Yvelines Diagonal | Breuil-Bois-Robert, Île-de-France, FR | Trail Running | 103 km80 km50 km23 km |
Date to be announced
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Date to be announced | Festival des 3 forêts | Mériel, Île-de-France, FR | Trail Running | 162 km100 km71 km65 km |
| Date to be announced | Salomon EcoTrail Paris Autumn | Paris, Île-de-France, FR | Trail Running | 80 km50 km20 km |
| Date to be announced | Ultra Trail du Pays de Fontainebleau | Fontainebleau, Île-de-France, FR | Trail Running | 87 km |
Events by Month
Overview & Route Character
Ultra-trails span from 50 km to over 160 km across mountain ranges and natural parks, requiring mandatory gear, night running skills, and self-sufficiency. Off-road running on singletrack, forest paths, and alpine ridges, spanning short discovery trails to high-mountain ultra-trails. In this Ultra-Trails in Île-de-France Region directory, RunningCompass curates 7 events comprising 37 individual races, including 4 events with confirmed upcoming dates.
Courses span distances ranging from 10 km to 162 km and elevation gains up to +4,900 m. Key host locations include Saint-Leu-la-Forêt, Paris, Montmorency, Breuil-Bois-Robert. Notable events in this selection include Trail Les 40 Bosses, Ecotrail Paris, 2T2M.
Questions & Answers
Frequently asked questions (FAQ)
How many events and races are listed under Ultra-Trails in Île-de-France Region?
This overview currently includes 7 verified events featuring 37 individual races. Of these, 4 events have confirmed upcoming dates on the calendar, while 3 events await next edition date confirmation from the organizer.
What race distances and elevation profiles are included in Ultra-Trails in Île-de-France Region?
Races in this selection span distances of 10 km to 162 km. The most demanding courses reach up to +4,900 m of positive elevation gain. Featured disciplines include Trail Running, Nordic Walking, Walking & Hiking.
Which host cities and flagship events stand out in Ultra-Trails in Île-de-France Region?
Top host locations include Saint-Leu-la-Forêt, Paris, Montmorency, Breuil-Bois-Robert, Mériel. Representative events in the catalog include Trail Les 40 Bosses, Ecotrail Paris, 2T2M, The Yvelines Diagonal. Ultra-trails span from 50 km to over 160 km across mountain ranges and natural parks, requiring mandatory gear, night running skills, and self-sufficiency.
How can I inspect route maps, elevation charts, and date filters for Ultra-Trails in Île-de-France Region?
Every event profile provides an interactive route map, a detailed elevation chart across all 37 races, and a GPX track download. You can also switch directly to the interactive map explorer to filter by date range and distance.