Demi-marathon de Montréal

Demi-marathon de Montréal 2025 Course Analysis

Demi-marathon de Montréal is a full marathon held in Montreal, Canada, scheduled for Saturday 20 September 2025. The course is run on road surface with 95m of total elevation gain, reaching a maximum altitude of 63m above sea level. For registration and full race details, visit the official Demi-marathon de Montréal website.

Elevation Profile

This is a very flat course with only 95m of total elevation gain across the full distance. The course ranges from 11m to 63m above sea level — a 52m elevation range that makes it one of the flatter races available. Runners targeting a personal best will appreciate the minimal climbing.

Expected Race Day Weather

Based on historical weather data for September, the expected race day conditions are as follows. Near-ideal running temperatures are expected, ranging from 4°C to 15°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a low chance of rain (0%), so dry conditions are likely.

Surface Type: Road

Demi-marathon de Montréal is run on road surfaces, which provide the fastest and most predictable conditions for marathon running. Road courses allow for consistent pacing and are typically the best choice for runners targeting a personal best time.

How Difficult Is Demi-marathon de Montréal?

Our difficulty rating for Demi-marathon de Montréal is calculated using a model that combines elevation gain, temperature impact, and surface type. Use the difficulty calculator above to enter your target finish time and see exactly how many minutes this course would add or subtract compared to a perfectly flat, cool, road-based marathon. Faster runners and slower runners are affected differently by the same course conditions, so the difficulty is personalised to your pace.

Looking for an easier marathon or a tougher challenge? You can also compare Demi-marathon de Montréal against other marathons to find the right race for your goals.