racecast.ioPartly cloudy throughout the day.
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Race Overview
A Boston-qualifier marathon that follows the beautiful St Lawrence River from Crysler Park Marina to St. Lawrence College in Cornwall, Ontario. As well as Half-Marathon, 10km and 5km distances that follow the scenic Great Lakes Waterfront Trail.
WikipediaFAQ
When is the 2026 St. Lawrence Marathon?
The 2026 St. Lawrence Marathon will be held on Saturday April 25, 2026.
Is the St. Lawrence Marathon a Boston Marathon Qualfier?
Yes, the St. Lawrence Marathon is an official Boston Marathon qualifier.
St. Lawrence Marathon Weather History
St. Lawrence Marathon Weather Averages
Average Temp: 48°, Average Low: 40°, Average High: 57°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 46° | 49° | 50° | 50° | 51° | 51° | 52° | 52° |
| Feel | 43° | 46° | 47° | 47° | 48° | 48° | 49° | 48° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 8mph | 8mph | 11mph | 9mph | 11mph | 10mph | 10mph | 12mph |
| Dew | 37° | 37° | 36° | 37° | 38° | 38° | 39° | 40° |
| RunScore |  | | | |  | | | |
St. Lawrence Marathon 2025
Apr 26, 2025
Cloudy skies throughout the day with rain.
Low: 44°, High: 52°, Moderate Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp |  46° | 47° | 47° |  47° | 49° | 50° | 50° | 50° |
| Feel | 42° | 43° | 43° | 44° | 47° | 49° | 50° | 48° |
| Rain | light | light | light | - | light | light | light | light |
| Wind | 7mph | 9mph | 7mph | 6mph | 4mph | 3mph | 1mph | 6mph |
| Dew | 44° | 44° | 45° | 45° | 47° | 47° | 47° | 47° |
| RunScore | | | |  | | | |  |
St. Lawrence Marathon 2024
Apr 27, 2024
Becoming cloudy in the afternoon with rain.
Low: 32°, High: 71°, Light Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp |  46° | 54° | 60° | 63° | 65° | 67° | 70° | 71° |
| Feel | 45° | 54° | 60° | 63° | 65° | 67° | 70° | 71° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 4mph | 7mph | 10mph | 10mph | 15mph | 13mph | 12mph | 12mph |
| Dew | 30° | 30° | 30° | 30° | 29° | 29° | 30° | 34° |
| RunScore | | | | | | | | |
St. Lawrence Marathon 2023
Apr 29, 2023
Partly cloudy throughout the day with rain.
Low: 46°, High: 55°, Heavy Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 53° | 55° | 54° | 51° | 49° | 47° | 48° | 48° |
| Feel | 53° | 55° | 54° | 51° | 47° | 44° | 43° | 43° |
| Rain | - | - | - | light | light | moderate | light | light |
| Wind | 6mph | 4mph | 12mph | 5mph | 5mph | 7mph | 11mph | 13mph |
| Dew | 40° | 39° | 36° | 40° | 43° | 44° | 43° | 44° |
| RunScore | | | | | |  | | |
St. Lawrence Marathon 2019
Apr 27, 2019
Partly cloudy throughout the day with a chance of rain throughout the day.
Low: 36°, High: 48°, Moderate Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 40° | 39° | 39° | 40° | 42° | 41° | 40° | 41° |
| Feel | 31° | 31° | 31° | 31° | 33° | 33° | 32° | 32° |
| Rain | light | light | light | - | light | light | light | - |
| Wind | 16mph | 13mph | 15mph | 17mph | 19mph | 16mph | 15mph | 16mph |
| Dew | 35° | 35° | 34° | 34° | 34° | 34° | 36° | 33° |
| RunScore |  | | | | | | | |