Colin Ralph was born in Maple Grove, Minnesota. Ralph played at Shattuck-St. Mary's prep school. Although prep schools usually are hit or miss with the competition players play against, Shattuck St. Mary's is at the top of prep-school play.
In 2022-2023, Ralph played 54 games and recorded two goals and 33 assists.
This past season, Ralph played 57 games and tallied eight goals and 58 assists. He also played two games for Dubuque in the USHL and went scoreless.
Ralph is committed to St. Cloud State next season which will greatly help him in his development.