DULUTH, MN (KDAL) - Registration for the William A. Irvin 5k on June 20th begins online Thursday at 12:01 a-m. The field limit for the race has been increased to 2000 which is 100 more than last year. The entry fee is 30 dollars and registration can be completed at GrandmasMarathon.com. Registration is continuing for Grandma's Marathon and the current 95 dollar fee increases to 110 dollars on the 1st of April until registration closes on May 31st. The Garry Bjorklund Half Marathon is full and registrations for that race are closed.