The school's college preparatory curriculum features a Catholic emphasis.

The school competes at the Class "L" level in 21 boys', girls' and coed varsity sports.

In the fall of 2019, the football team won the Division III state championship.

The school fields a FIRST Robotics Competition Team, which competed on the national level in 2011.

[7] The Trinity boys' basketball team won the Class "L" championship against Dover High School at UNH's Lundholm Gym in 1985.