Test your limits in the shadow of a historic château at the 38th Semi-Marathon de Rambouillet on Sunday, 29 March 2026. More than just a race, this premier event doubles as the official Yvelines Departmental Championship and a qualifier for the French National Semi-Marathon Championships, attracting a field of elite and amateur runners. With a strict cap of 2,600 participants following a sell-out 2025 edition, securing a bib is a competitive feat in itself. The acclaimed course offers a perfect balance, winding through the charming city center before immersing you for two-thirds of its distance in the serene, leafy expanse of the Rambouillet National Forest. Organized by the Rambouillet Olympique club, this March tradition is renowned for its impeccable organization and a uniquely welcoming atmosphere that bridges competitive spirit and communal joy. Prepare for a fast, scenic, and prestigious run where forest paths meet championship dreams. Don't miss your chance to be part of this celebrated sporting tradition.
Races Offered
Semi-marathon de rambouillet
Mar 16, 2025
straighten
Distance —
21.1K
terrain
Type —
Running
timer
09:00
Weather History
These values represent the 3-year monthly averages for March in Rambouillet.
thermostatTemperature
4.1° / 12.1°
wb_sunnyFeels like
0.1° / 8.2°
light_mode
Avg sunshine hours
7h 14m
water_drop
Avg rainfall
2.4 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
14.1 km/h (Gentle breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Low (2.8)
humidity_mid
Humidity
80.6%
wb_twilight
Sunrise
08:02
nightlight
Sunset
19:58
About Rambouillet
Learn more about the host city, Rambouillet.
Rambouillet is a town in the Yvelines department of Île-de-France, to the south-west of Paris. It is most well-known for the Château de Rambouillet and its vast grounds which blend into the Forest of Rambouillet, which also acted as the official summer residence of the President of France until 2009.
