The 2025 event has concluded.

Niagara Ultra Races Marathon

Niagara-on-the-Lake, ON, Canada • June 21, 2025

Race Day Weather

65°

82° high

Windy

Light rain likely

Warm start, light rain expected

Runners will face a starting temperature of 65°F, rising to 82°F by finish, with humidity at 75% and a dew point of 66°F. A light rain will persist throughout, with winds from the S at 13 mph, gusting to 25 mph. Runners should adjust their pace conservatively and stay hydrated, especially as temperatures climb.

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

3 PM

Pre-raceRace windowPost-race

Course Map

FAQ

When is the 2025 Niagara Ultra Races Marathon?

The 2025 Niagara Ultra Races Marathon will be held on Saturday June 21, 2025.

Is the Niagara Ultra Races Marathon a Boston Marathon Qualifier?

Yes, the Niagara Ultra Races Marathon is an official Boston Marathon qualifier.

What is the time limit for the Niagara Ultra Races Marathon?

The time limit for the Niagara Ultra Races Marathon is 6 hours.

Historical Weather

Based on 23 years of data

Avg Temp

72°F

L:63° H:73°

RunScore

Conditions

Rain Freq

22%

5 of 23 yrs

Wind9mph

Dew56°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2024 Niagara Ultra Races Marathon Clear conditions throughout the day. 2024	60°/65°	-	51°
2023 Niagara Ultra Races Marathon Clear conditions throughout the day. 2023	61°/73°	-	56°
2022 Niagara Ultra Races Marathon Clearing in the afternoon. 2022	56°/63°	-	46°
2019 Niagara Ultra Races Marathon Partly cloudy throughout the day with late afternoon rain. 2019	64°/67°	-	52°
2018 Niagara Ultra Races Marathon Clear conditions throughout the day. 2018	63°/77°	-	56°
2017 Niagara Ultra Races Marathon Clearing in the afternoon. 2017	71°/85°	-	65°
2016 Niagara Ultra Races Marathon Becoming cloudy in the afternoon. 2016	66°/78°	-	51°
2015 Niagara Ultra Races Marathon Partly cloudy throughout the day. 2015	58°/65°	-	55°
2014 Niagara Ultra Races Marathon Partly cloudy throughout the day with morning rain. 2014	54°/63°	Light	47°
2013 Niagara Ultra Races Marathon Partly cloudy throughout the day with late afternoon rain. 2013	69°/80°	-	60°
2012 Niagara Ultra Races Marathon Partly cloudy throughout the day. 2012	64°/74°	-	55°
2011 Niagara Ultra Races Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2011	65°/73°	Light	58°
2010 Niagara Ultra Races Marathon Partly cloudy throughout the day. 2010	73°/78°	-	64°
2009 Niagara Ultra Races Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2009	59°/61°	Light	58°
2008 Niagara Ultra Races Marathon Partly cloudy throughout the day. 2008	54°/59°	-	48°
2007 Niagara Ultra Races Marathon Partly cloudy throughout the day. 2007	59°/66°	-	44°
2006 Niagara Ultra Races Marathon Partly cloudy throughout the day. 2006	62°/71°	-	59°
2005 Niagara Ultra Races Marathon Partly cloudy throughout the day with late afternoon rain. 2005	76°/86°	-	64°
2004 Niagara Ultra Races Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2004	55°/66°	Light	52°
2003 Niagara Ultra Races Marathon Partly cloudy throughout the day with early morning rain. 2003	67°/79°	-	54°
2002 Niagara Ultra Races Marathon Partly cloudy throughout the day. 2002	65°/80°	-	59°
2001 Niagara Ultra Races Marathon Partly cloudy throughout the day with rain. 2001	75°/86°	Light	65°
2000 Niagara Ultra Races Marathon Partly cloudy throughout the day with rain. 2000	64°/78°	-	62°