| Cheerleading | Year-round | Mrs. Teed | NA |
| Football | Fall | Mr. Johnston or Mr. Wojick | NA |
| Girls Softball | Fall | Mrs. Hulbert | Tryouts in the fall |
| Cross Country | Fall | Mr. Budd or Ms. Keith | distance running team, for any students that enjoy running, competitively or recreationally |
| Boys Baseball | Fall | Mr. Jardine | Tryouts usually begin in August |
| Girls Field Hockey | Fall | Mrs. Manning | Tryouts usually during the first week of school |
| Girls Soccer | Fall | Mr. Pollock | Tryouts usually during the first week of school |
| Boys Soccer | Fall | Mme. Boudreau | NA |
| Golf Team | Fall | Miss Vaters | The team consists of 6 team members. The high school teams will compete in a regional championship. The top 3 individual players, as well as the top 4 schools from regional tournament will represent the Easter conference at the provincial final, usually held in early October. |
| Swim Team | Fall/Winter | Ms. MacDonald and Miss Badiuk | Students who have been synchro swimmers, speed swimmers or simply enjoy swimming are welcome. The season begins in the middle of October and provincials are in December. It is a short season, but a fun season. |
| Boys and Girls Wrestling | Winter | Mr. DeVito | NA |
| Girls Basketball (Varsity and Junior Varsity) | Fall/Winter | Mr. Budd | Tryouts typically held in mid to late October. All grades are welcome as this is a time for potential Junior and Senior level players. |
| Boys Basketball (Varsity and Junior Varsity) | Fall/Winter | Mr. Johnston | Tryouts typically held in mid to late October. All grades are welcome as this is a time for potential Junior and Senior level players. |
| Boys Hockey | Winter | Mme. Boudreau | NA |
| Girls Hockey | Winter | Mme. Boudreau | NA |
| Girls Volleyball (Varsity) | Spring | Mr. Johnston | Tryouts typically held before March Break. Lots of girls have been attending open gyms this summer to improve their skills and are ready to play a competitive season this year! |
| Boys Volleyball (Varsity) | Spring | Mr. Johnston | Tryouts typically held before March Break. Lots of girls have been attending open gyms this summer to improve their skills and are ready to play a competitive season this year! |
| Badminton | Spring | Mr. Schock or Mr. Pollock | NA |
| Track and Field | Spring | Mr. Budd or Ms. Keith | NA |
| Boys Rugby | Spring | Mr. Moore | NA |
| Girls Rugby | Spring | Ms. MacCormack | NA |
| Prom Committee | Spring | Mr. Cormier or Mrs. Wilson | Starts after March break. We prepare decorations for prom for our grads that takes place on June. We work 3 days/week after school, obligation to decorate the Sunday before Prom and opportunity to attend prom as a host/hostess. |
| Yearbook Committee | Year-round | Mr. Morin | For anyone who is willing to help create the HTHS yearbook. Many aspects from start to finish. Some areas are photography, design/layout, interviewing, writing, digital setup and more. |
| Gardening Club | Fall and Spring | Mme. O'Brien | This club helps keep the courtyard looking good. They work in Sept and Oct and then again in the spring. |
| Drama Club | Year-round | Ms. Loewen | Drama club at HTHS is a fun, challenging, and rewarding experience that is open to all grade levels for auditions. No theatre experience necessary. We will put on one or two plays for the public in May, and we hope to attend the New Brunswick Drama festival in Fredericton as has been our tradition for many years. Auditions will be held end of January and/or beginning of February. |
| Chess Club | Year-round | Mr. Renaud | If you like playing chess or would like to learn to play chess, then come join H-T-H-Chess! Its Fun! Its Free! |
| Canoe Club | Spring | Mr. Stewart | NA |
| Breakfast Club | Year-round | Ms. Jasper | We provide breakfast for anyone in need Mon-Fri from 8:10-8:40am. We rely on the help of student volunteers to prepare and serve the food in the cafeteria. The commitment is maximum one day per week for that half hour. |
| Music Ensembles | Year-round | Mr. Snelgrove | Club usually kicks off in September |
| Concert Band | Year-round | Mr. Snelgrove | This is an instrumental group that performs both in and out of school. It is open to anyone who has experience with woodwind, brass, string, or percussion instruments. Practices are 90 minutes/week at lunch and one day after school. |
| Grade Representatives | Year-round | Ms. Hoadley or Mrs. Babineau-Hall | Grade reps. are students from each grade that help to get students involved in student life and help with general student led initiatives at Harrison Trimble High School. Students are typically elected in mid to late September. Follow student council social media accounts to know more and get specific dates! |
| Cyber Titan | Year-round | Mr. Flanagan | This competition puts teams of students in the position of newly hired IT professionals tasked with managing the network and computers of a small company through a set of virtual images that represent operating systems and are tasked with finding cybersecurity vulnerabilities and hardening the system. Students compete against schools in New Brunswick as well as North America. Signups start in September. Teams of up to 6 can be students in grades 9 through 12. |
| Le concours d'art oratoire | Spring | Mme. Hebert | This will begin in January. Its an annual French public-speaking competition. The competition is open to students in both FILA and PIF in all grade level. |
| Dungeons and Dragons Club | Year-round | Mr. Denton | Club meets weekly on Mondays and Wednesdays during the noon hour. |
| Weight Room | Year-round | Mr. Leger | Open daily from 3:30pm to 4:45pm |
| Writing Club | Year-round | Mr. DeVito | NA |
| Trojans in Action | Year-round | Mrs. Bell | Trojans in Action is a volunteer group at Harrison Trimble High School that helps those in need locally and globally. |
| Trojan Trend Shop | Year-round | Ms. MacCormack or Mrs. Stead | NA |
| Mental Health Committee | Year-round | Ms. Jasper or Ms. MacCormack | This is a group of students who want to educate and support positive mental health in the school. In the past we had Therapy Dogs, a Calm Room and attended the Mental Health Symposium. |
| Mentor Program | Year-round | Mrs. Teed | Students in grades 10/11/12 apply to the program in the spring. Our mentors contribute positively to the Trojan community when needed. |
| Bike Repair Club | Year-round | Mr. Beaton | Once a day weekly during lunch in the workshop. |
| Ski Club | Winter | Mr. Beaton | Approx. 6 ski trips to Poley Mountain per season - transportation provided. |
