DULUTH (AP) — The 40th Grandma's Marathon already has a full field for this year's races in northeastern Minnesota.

All the weekend races — the William A. Irvin 5K, the Garry Bjorklund Half Marathon and the full Grandma's Marathon — were full as of Thursday. Registration has closed.

The 5K has 2,000 runners, the half marathon 7,500 and the full marathon 9,100. The number of runners is based on safety and what the course can handle.

A Grandma's representative says it's the first time the marathon has been at full capacity since 2008.

Registration opened on Oct. 1, 2015. Grandma's Marathon, from Two Harbors to Duluth, and the half marathon will be run June 18. The 5K is June 17.