The Urban Trail du Pecq and Mesnil returns for its fourth edition with an expanded lineup of races to cater to runners of all levels. Building on the success of last year's 11km race, this year’s event introduces a new 20km course that winds through verdant landscapes while continuing to support CASIOPEEA, an association dedicated to fighting breast cancer. The shorter 11km route begins with a warm-up lap around Parc Corbière before following the Seine River past landmarks like Les Pyramides. Runners then navigate through public buildings and unexpected terrain in both Pecq and Mesnil, culminating at the scenic Berges de Seine park for the return journey to Parc Corbière. This course features an elevation gain of over 100 meters. The longer 20km race follows a similar initial path before diverging into lush forests near St Germain’s terrace. It continues through Mesnil, offering runners a more extensive exploration of natural beauty and varied terrain compared to the shorter route. Both races are timed events that award top finishers in each category as well as overall winners. The 11km race is open to athletes born on or before 2011 while the 20km event welcomes those born on or before 2009. Participants must provide up-to-date PPS attestations, FFA licenses, or equivalent for adults. For minors over 16 years old, a medical certificate remains mandatory despite recent changes to French sporting regulations. A family-friendly 8km walk is also part of the event schedule, featuring local history and environmental enigmas along the route. Participants receive small gifts upon completion. The day’s activities kick off at 9:00 AM with the start of the longer 20km race followed by the shorter Urban Trail du Pecq at 9:30 AM. Both races conclude in Parc Corbière, which serves as a central hub for all events including a children's run within the park’s grounds. Dossards can be collected on-site either Saturday from 14:00 to 18:00 or Sunday starting at 7:00 AM. After completing their runs, participants are invited to join the optional enigmatic walk with briefing sessions available before departure and a chance to submit answers upon return by 13:30 PM. The event promises an engaging day filled with scenic routes, competitive races, family activities, and community spirit in support of a worthy cause.
Races Offered
UTPM20 - 20 km
Sep 27, 2026
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Distance —
20K
terrain
Type —
Running
timer
09:00
sell
€20.00
UTPM11 - 11 km
Sep 27, 2026
straighten
Distance —
11K
terrain
Type —
Running
timer
09:30
sell
€12.00
MiniRun 3-6ans - 0,5 km
Sep 27, 2026
straighten
Distance —
0.5K
terrain
Type —
Running
timer
11:40
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€3.00
URun KIDS - 1 km
Sep 27, 2026
straighten
Distance —
1K
terrain
Type —
Running
timer
11:45
sell
€3.00
Rando à énigmes - 8 km
Sep 27, 2026
straighten
Distance —
8K
terrain
Type —
Running
timer
24 days remaining
sell
€5.00
Weather History
These values represent the 3-year monthly averages for September in Le Pecq.
thermostatTemperature
12.9° / 21.4°
wb_sunnyFeels like
11.4° / 19.7°
light_mode
Avg sunshine hours
8h 34m
water_drop
Avg rainfall
3.0 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
11.4 km/h (Light breeze)
opacity
Sweat loss rate
Moderate
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (3.5)
humidity_mid
Humidity
77.0%
wb_twilight
Sunrise
07:28
nightlight
Sunset
20:03
About Le Pecq
Learn more about the host city, Le Pecq.
Le Pecq is a commune in the Yvelines department in the Île-de-France region in north-central France. It is located in the western suburbs of Paris, 18.4 km (11.4 mi) from the centre of Paris.
