Road Running

Boucle de Seine Half Marathon

Road Running covering 21.1 km with up to 59 m D+ in Chatou (Île-de-France, France)

LocationChatou, Île-de-France, FranceShow on map(48.8902° N, 2.1575° E)
Date & StatusMarch 21, 2027Date confirmed
Elevation gainUp to +59 m

Boucle de Seine Half Marathon is an endurance sporting event in Chatou, Île-de-France, FR focused on Road Running. Key features include City Run, Point-to-Point.

The competition program features Half Marathon (21.1 km, +59 m D+). The next edition is officially confirmed for March 21, 2027. Official race regulations, course details, and registration information are provided on the organizer's website (semimarathonboucledeseine.fr).

Official website
Boucle de Seine Half Marathon in Chatou (Work: "Runners @ Marathon de Paris @ Seine @ Paris", Photo: Guilhem Vellut from Paris, France, License: CC BY 2.0, Source: Wikimedia Commons)
"Runners @ Marathon de Paris @ Seine @ Paris" · Photo: Guilhem Vellut from Paris, France · Wikimedia CommonsCC BY 2.0
Cropped to 16:9 (960 × 540 px), WebP

Event characteristics

City RunPoint-to-Point

Races & distances (1)

CompetitionDisciplineDistanceElevation gainAltitude rangeCourse typeCourse & profile
Half MarathonRoad Running21.1 km+59 m2 m - 40 mPoint-to-point courseRoute & profile
Course & Elevation Telemetry

Course route & map

Half Marathon21.1 km
Distance
21.1 km
Elevation gain
+59 m D+
Elevation loss
-50 m D-
Altitude range
2 m - 40 m
Gradient (Avg / Max)
0.5 % / 1.1 %
Course format
Point-to-point course
21.1 km+59 m D+
Start (S)Finish (F)
N5101520FS48.8902° N, 2.1575° E

Elevation profile & course telemetry

Altitude from 2 m to 40 m above sea level (+59 m D+, -50 m D-)

Peak: 40 m·at 12.9 km·Ø 0.5 %
2 m15 m27 m40 m0 km4.2 km8.4 km12.7 km16.9 km21.1 km40 m
Event Information & Answers

Frequently asked questions (FAQ)

When and where does Boucle de Seine Half Marathon take place?

Boucle de Seine Half Marathon takes place in Chatou, Île-de-France, FR (start area at coordinates 48.8902° N, 2.1575° E). The next edition is officially confirmed for March 21, 2027.

What races and distances are offered at Boucle de Seine Half Marathon?

The competition program features Half Marathon (21.1 km, +59 m D+). The competitions belong to Road Running.

What is the course layout and elevation profile for Boucle de Seine Half Marathon?

The main competition (Half Marathon over 21.1 km) is designed as a point-to-point course featuring +59 m of elevation gain and -50 m of elevation loss, ranging between 2 m and 40 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 Boucle de Seine Half Marathon?

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