Another great event that is part of Grandmas Marathon weekend is ready to open for registration this week.  However, if you want to participate you'll want to register as soon as you can as this does fill up.

Grandmas Marathon is reporting that registration for the 20th annual William A. Irvin 5K opens at 12:01 a.m. on Thursday, March 14.
The field limit for the 2013 race is 1,900 — the same as last year when capacity was reached on April 30. To register, runners should visit beginning Thursday. The entry fee of $30 remains unchanged from a year ago.
The 3.1-mile run begins at 6 p.m. on Friday, June 21, near the permanently docked William A. Irvin ore boat on Duluth’s waterfront and is the kickoff for running events during Grandma's Marathon weekend. Registration remains open for the 37th annual Grandma’s Marathon set for Saturday, June 22, while the entry process for the 23rd annual Garry Bjorklund Half Marathon is closed.