Grandma's Marathon

JUN

19-20

2026

A multi race weekend in Duluth, Minnesota centered on a full and half marathon along Lake Superior. The program also features a 5K, kids races, a fitness expo and community focused youth programs.

19-20 Jun 2026

Duluth, Minnesota

Website Registration

26 miles 13 miles 5 miles 5 kilometers

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Grandma's Marathon, Duluth MN

Grandma's Marathon is an annual race weekend based in Duluth, Minnesota. The main events include a full marathon and a half marathon that run along the shores of Lake Superior. The marathon course is described as relatively flat and fast. The Garry Bjorklund Half Marathon follows a 13.1 mile route along the lake before reaching the city limits and finishing in Canal Park. The William A. Irvin 5K starts and finishes near the historic William A. Irvin ore boat in Canal Park.

The weekend program includes multiple races and community events such as a fitness expo, a spaghetti dinner, a music festival, and kids races called the Whipper Snapper Races. The Great Grandma's Challenge combines the Friday 5K with either the full or half marathon the following day. Events connected to the weekend are organized by the Young Athletes Foundation, which runs youth programs, grants, scholarships, and a running shoe program for local children. Volunteers support the events throughout the year and are an important part of weekend operations.

The event draws a large field of participants from many places and typically hosts more than 20,000 runners from over 50 countries and all 50 states. Race dates for 2026 include June 19 and June 20 for various weekend races. Visit the organization's website for the most recent information.