Trail RunningUTMB Index Races

Ultra-Trail Oise Cosacienne

Trail Running covering 10 km to 110 km with up to 3,000 m D+ in Choisy-au-Bac (Hauts-de-France, France)

LocationChoisy-au-Bac, Hauts-de-France, FranceShow on map(49.4364° N, 2.8791° E)
Date & StatusDate to be announcedDate TBA
Elevation gainUp to +3,000 m

Ultra-Trail Oise Cosacienne is an endurance sporting event in Choisy-au-Bac, Hauts-de-France, FR focused on Trail Running. It is part of UTMB Index Races. Key features include Culture & History, Mountain, Forest, Nature & Off-Road.

The race program comprises 5 competitions, including L'UTOC Relais (110 km, +3,000 m D+), L'UTOC Solo (110 km, +3,000 m D+), La TOC (55 km, +1,500 m D+), Les 20 km du Viaduc (20 km, +600 m D+), and Les 10 km du Viaduc (10 km, +150 m D+). The exact date for the next edition is currently open and will be announced by the organizer. Official race regulations, course details, and registration information are provided on the organizer's website (facebook.com).

Official website
Ultra-Trail Oise Cosacienne in Choisy-au-Bac (Work: "Cap Blanc Nez 1", Photo: Donarreiskoffer, License: CC BY-SA 3.0, Source: Wikimedia Commons)
"Cap Blanc Nez 1" · Photo: Donarreiskoffer · Wikimedia CommonsCC BY-SA 3.0
Cropped to 16:9 (960 × 540 px), WebP · Shared under the same license

Event characteristics

Culture & HistoryMountainForestNature & Off-RoadRelayMulti-DayHigh Altitude

Races & distances (5)

CompetitionDisciplineDistanceElevation gainAltitude rangeCourse typeCourse & profile
L'UTOC RelaisTrail Running110 km+3,000 m33 m - 1,293 mLoop courseRoute & profile
L'UTOC SoloTrail Running110 km+3,000 m36 m - 1,296 mLoop courseRoute & profile
La TOCTrail Running55 km+1,500 m39 m - 669 mLoop courseRoute & profile
Les 20 km du ViaducTrail Running20 km+600 m42 m - 294 mLoop courseRoute & profile
Les 10 km du ViaducTrail Running10 km+150 m45 m - 108 mLoop courseRoute & profile
Course & Elevation Telemetry

Course route & map

Distance
110 km
Elevation gain
+3,000 m D+
Elevation loss
-3,000 m D-
Altitude range
33 m - 1,293 m
Gradient (Avg / Max)
5.5 % / 9.9 %
Course format
Loop course
110 km+3,000 m D+
Start (S)Finish (F)
N20406080100FS49.4364° N, 2.8791° E

Elevation profile & course telemetry

Altitude from 33 m to 1,293 m above sea level (+3,000 m D+, -3,000 m D-)

Peak: 1,293 m·at 42.2 km·Ø 5.5 %
33 m453 m873 m1,293 m0 km22 km44 km66 km88 km110 km1,293 m
Event Information & Answers

Frequently asked questions (FAQ)

When and where does Ultra-Trail Oise Cosacienne take place?

Ultra-Trail Oise Cosacienne takes place in Choisy-au-Bac, Hauts-de-France, FR (start area at coordinates 49.4364° N, 2.8791° E). The exact date for the next edition is currently open and will be announced by the organizer.

What races and distances are offered at Ultra-Trail Oise Cosacienne?

The race program comprises 5 competitions, including L'UTOC Relais (110 km, +3,000 m D+), L'UTOC Solo (110 km, +3,000 m D+), La TOC (55 km, +1,500 m D+), Les 20 km du Viaduc (20 km, +600 m D+), and Les 10 km du Viaduc (10 km, +150 m D+). The competitions belong to Trail Running.

What is the course layout and elevation profile for Ultra-Trail Oise Cosacienne?

The main competition (L'UTOC Relais over 110 km) is designed as a loop course featuring +3,000 m of elevation gain and -3,000 m of elevation loss, ranging between 33 m and 1,293 m above sea level. An interactive course map with route visualization, elevation profile, and GPX export is available in the course section on this page.

Where can I find registration and official race rules for Ultra-Trail Oise Cosacienne?

Official race regulations, course details, and registration information are provided on the organizer's website (facebook.com).