Great Grandma’s Challenge

Rise to the challenge.

While Grandma’s Marathon Weekend won’t be happening in real-time this year, we invite you to complete your marathon, half marathon, and 5K goals by running with us Virtually!

The virtual races are being conducted on an honor system! Please uphold the spirit of honest racing by running the full distance of your race, and reporting accurate times.

If you registered for a Challenge prior to March 31, you are automatically enrolled in the virtual version of the race(s) that you registered for.


Up for the ultimate running experience during Grandma’s Marathon weekend? Take the Great Grandma’s Challenge. By participating you’ll have the chance to take your Grandma’s Marathon weekend experience to a higher level by running the William A. Irvin 5K and Grandma’s Marathon OR the Garry Bjorklund Half Marathon.

It’s time to challenge yourself.


Registration will open for 2021 on October 1, 2020, at 7:00 p.m. (Central Time).

Challenge participants are guaranteed entry into Grandma’s Marathon OR the Garry Bjorklund Half Marathon AND the William A. Irvin 5K.

Entry Fees:

Half Great Grandma’s Challenge:
$160: Oct 1-Oct 31

Full Great Grandma’s Challenge:
$170: Oct 1-Oct 14
$185: Oct 15-Oct 31
$190: Nov 1-Nov 30
$195: Dec 1-Dec 31
$205: January 1-March 31
$215: April 1-June 1

Challenge Limit: 500 participants for each challenge

Swag: Finishers of the 2020 Great Grandma’s Challenge will receive an exclusive Great Grandma’s Challenge jacket! Jackets will be shipped to participants, along with their finisher shirts and medals in August, after participants have uploaded their finisher times to their personal results page.