The Demi-Marathon Sun Life de Longueuil returns to Longueuil, Quebec on September 20th, offering a variety of distances including the 5K run and 10km race for both runners and walkers. Set in the picturesque setting of Parc Émile-Nelligan, this event boasts a course that weaves through lush green spaces and scenic streets. On race morning at 7am, expect a crisp autumn temperature around 18°C with clear skies and light winds. The atmosphere is one of community spirit as participants gather to support the local cause. This running festival has been a fixture in Longueuil for over a decade, drawing thousands of runners each year who come together to raise funds for the Children’s Cancer Hospital Foundation. With hundreds of participants annually, this event stands out not only for its distance options but also for its deep-rooted connection to the local community. The course venue offers a mix of paved roads and minor paths through Parc Émile-Nelligan. The 5K race starts at the park's main entrance on Boul de Longueuil before winding through neighborhoods like Saint-Lambert, known for its friendly streets. Notable features include a gentle incline near the halfway point followed by a scenic downhill run towards the finish line. Race morning brings temperatures ranging from a minimum of 13.7°C to a maximum of 22.4°C with an average humidity level of 76%, making it feel comfortable and pleasant for runners. The course features three aid stations along its route, ensuring participants stay hydrated during their run. The start is marked by the iconic fountain at Parc Émile-Nelligan.
1 km Enfant Soleil (12 ans et moins) 1km • Start: 06:30:00 • Fee: 23,16 $
How to register? Visit https://raceroster.com/events/2026/112932/demi-marathon-sun-life-de-longueuil for details. Registration fees range from $44.87 to $82.87 and close on September 15th, so secure your spot soon! Bib pickup will be held at the Longueuil Community Centre on September 19th from 3pm-6pm; bring a photo ID. The starting address is Boul de Longueuil, next to Parc Émile-Nelligan. Participants must be aged 12 and older for the race distances (walkers are welcome). First-timers should ensure they have their bib number, timing chip, and appropriate attire for comfortable running in autumn temperatures. First timers and locals alike will find this event worth attending as it supports a vital local cause while offering scenic routes through Longueuil.
Races Offered
1 km Enfant Soleil (12 ans et moins)
Sep 20, 2026
straighten
Distance —
1km
terrain
Type —
Running
timer
06:30
sell
$23.16
10 km Course
Sep 20, 2026
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Distance —
10km
terrain
Type —
Running
timer
06:30
sell
$61.16
10 km Marche
Sep 20, 2026
straighten
Distance —
10km
terrain
Type —
Running
timer
06:30
sell
$61.16
21,1 km
Sep 20, 2026
straighten
Distance —
21km
terrain
Type —
Running
timer
06:30
sell
$82.87
5 km Course
Sep 20, 2026
straighten
Distance —
5km
terrain
Type —
Running
timer
06:30
sell
$44.87
5 km Marche
Sep 20, 2026
straighten
Distance —
5km
terrain
Type —
Running
timer
06:30
sell
$44.87
Weather History
These values represent the 3-year monthly averages for September in Longueuil.
thermostatTemperature
13.5° / 22.3°
wb_sunnyFeels like
12.4° / 21.3°
light_mode
Avg sunshine hours
9h 53m
water_drop
Avg rainfall
1.9 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
9.8 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
75.9%
wb_twilight
Sunrise
06:33
nightlight
Sunset
19:03
About Longueuil
Learn more about the host city, Longueuil.
Longueuil (lahng-GUUY) is a city of 240,000 people (2016) in the Longueuil agglomeration in the suburbs of Montreal on the south shore of the St. Lawrence River. There are three nature parks in Longueuil: Parc Marie-Victorin and Parc Michel-Chartrand in Le Vieux-Longueuil and Parc de la Cité in Saint-Hubert. It is also home to a wildlife reserve, the Boisé du Tremblay.
