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. Grandma's Marathon's flat profile means your pacing discipline, not the terrain, decides the day.
Page rebuilt 2026-10-01 · race facts not independently verified — confirm dates and 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.
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:
We don’t hold a confirmed date for this edition, so any countdown comes from the date you enter here.
Build your training around Grandma's Marathon.
RunV works backwards from race day to today and rearranges the weeks when life interrupts. It does not adapt to this specific course — the pacing guidance above is where the course knowledge is.
Everything above stays free and complete — this is an optional next step, not a paywall.
Asked often
- When is 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 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 Grandma's Marathon?
- Build for the course you'll actually race at 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 →
More marathon races
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.
