Races Marathon · Duluth, USA
Grandma's Marathon
Grandma's Marathon is a flat marathon in Duluth, USA, held each June. A gently rolling point-to-point down the Lake Superior shore into Duluth — small rises only, with Lemon Drop Hill late. The lake keeps June starts cool, typically 8-16C, though warm years happen. The Grandma's Marathon's flat profile means your pacing discipline, not the terrain, decides the day.
Last updated 2026-07-03 · confirm dates & entries on the official race site
When
June
every year
Course
flat
Marathon
Conditions
The lake keeps June starts cool, typically 8-16C, though warm years happen.
Racing this course well
A gently rolling point-to-point down the Lake Superior shore into Duluth — small rises only, with Lemon Drop Hill late.
The Grandma's Marathon's flat profile means your pacing discipline, not the terrain, decides the day.
Pick your goal for Duluth
Pace charts, weekly structure and timelines for the most common marathon goals:
Asked often
- When is the Grandma's Marathon?
- It is held each June in Duluth, USA. Check the official Grandma's Marathon site for the exact date and entry windows.
- Is the Grandma's Marathon course flat?
- A gently rolling point-to-point down the Lake Superior shore into Duluth — small rises only, with Lemon Drop Hill late.
- How should I train for the Grandma's Marathon?
- Build for the course you'll actually race at the Grandma's Marathon: flat terrain, June conditions. RunV generates a plan for your goal time and rebuilds it every time life interrupts the Duluth build.
Not sure what to target? Predict your marathon time from a recent race →
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Build for Duluth — around your actual life
RunV engineers your block backwards from race day in June — and rebuilds it every time training doesn't go to script.
