Runners will face temperatures starting at 59°F and peaking at 69°F, with average humidity at 66%. A crosswind will be present throughout most of the race, shifting to a headwind in Mile 27, where runners should be prepared to adjust their effort. With comfortable conditions, maintaining hydration and pacing conservatively is essential, especially during the rolling terrain.
Race day forecast available in 86 days
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Distance: 26.2mi
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Common Goals:
Grandma's Marathon is an annual road race held each June in Duluth, Minnesota, in the United States. The course runs point-to-point from the city of Two Harbors on Scenic Route 61 and continues along Lake Superior into the city of Duluth. The finish is located in Canal Park, near Grandma's Restaurant, which is next to the highly visible Aerial Lift Bridge.Wikipedia
FAQ
When is the 2026 Grandma's Marathon?
The 2026 Grandma's Marathon will be held on Saturday June 20, 2026.
Is the Grandma's Marathon a Boston Marathon Qualifier?
Yes, the Grandma's Marathon is an official Boston Marathon qualifier.
What is the time limit for the Grandma's Marathon?
The time limit for the Grandma's Marathon is 7 hours.
Historical Weather
Based on 26 years of data
Avg Temp
66°F
L:58° H:67°
RunScore
Conditions
Rain Freq
31%
8 of 26 yrs
Wind10mph
Dew53°F
Temperature History
Range of temperatures during race hours for each year.
