2009-10: Grant Besse participated in USA Hockey's Select 15 Camp and competed for Team Northwest in the Minnesota-based Upper Midwest Elite High School league in the fall before skating for Benilde-St. Margaret's in Minnesota as a freshman. Besse was the third-leading scorer for B-SM with 30 goals with 20 assists in 27 games, including 3 goals and 1 assist in two section playoff games, and was +21 with 12 penalty minutes. Benilde-St. Margaret's fell to Minnetonka in the Section 6AA playoffs. Besse was selected by Muskegon in the fourth round (59th overall) of the USHL Futures Draft.
2010-11: Besse had 20 points in 22 games for Team Northwest in the UMWHSEL in the fall before returning to Benilde-St. Margaret's for his sophomore season. He scored 9 goals with 11 assists in 22 games for Team Northwest. In 27 games with B-SM he scored 33 goals with 20 assists and was +30 with 18 penalty minutes. Benilde-St. Margaret's was 20-4 during the regular season before falling to Wayzata in the Section 6AA playoffs.
2011-12: Besse again participated in the UMWEHSL and averaged three points per game for Minnesota Class AA champion Benilde-St. Margaret's as a junior. He scored 17 goals with 18 assists in 24 games for Team Northwest in the fall. Besse was the leading scorer in Minnesota high school hockey, finishing with 52 goals and 41 assists in 31 games for B-SM and was +31 with 22 penalty minutes. Benilde-St. Margaret's defeated Minnetonka to capture the Section 6AA title and Besse scored all five goals for B-SM in the Red Knights' 5-1 win over Hill-Murray in the Class AA state championship game. In January he committed to playing college hockey at Wisconsin in 2014-15. In May the Omaha Lancers' obtained Besse's USHL rights in a trade with Muskegon.
2012-13: Besse made his USHL debut, skating in seven games for Omaha following his senior season at Benilde-St. Margaret's. He had 4 goals and was -3 in his stint with the Lancers. Besse was named Minnesota high school hockey's Mr. Hockey, scoring 48 goals with 28 assists in 28 games while finishing +51 with 18 penalty minutes in 28 games for Benilde-St. Margaret's. The Red Knights reached the Section 6AA championship game – falling to Wayzata, 5-2. Besse was ranked 124th amongst North American skaters in Central Scouting's final rankings and was selected by Anaheim in the fifth round (147th overall) in the 2013 NHL Draft.
Besse has been a standout and record breaking player on the Minnesota high school scene for a few years now. He won the Minnesota Mr. Hockey Award and the Minnesota State Championship with Benilde-St. Margaret’s Prep 2012-13. He is a prolific scorer who had 160 goals in 149 career games. He is a highly skilled offensive player and a very good skater. The setback, however, is his size at 5'9. Ultimately due to that lack of size, he is seen as a low-risk, high-reward player.
Besse is one of the best players in Minnesota high school history. He embarks on a new adventure now in the NCAA. He was recruited by the Wisconsin Badgers and will be playing against much older players. It is going to be a huge transition for Besse and scouts will be keeping a sharp eye on him to see if the record-breaking offensive skills translate over into a much more difficult and challenging game in the Big Ten.