Undrafted, Trepanier played in the
National Hockey League for the
Colorado Avalanche,
Mighty Ducks of Anaheim, and the
Nashville Predators, appearing in 229 regular season games, scoring 12 goals and 22 assists for 34 points, picking up 252 total penalty minutes between 1998 and 2002. After spending the entire
2003–04 season in the AHL with the
Hershey Bears, Trepanier left North America to sign in
Germany with
Nürnberg Ice Tigers of the
Deutsche Eishockey Liga during the
2004 NHL Lockout. Pascal remained in Europe and played in the Swiss
NLA with
SC Bern the following season before returning to the DEL with
Adler Mannheim. Trepanier established himself within the German league as one of the premier offensive defenseman, topscoring for the Eagles defense in three consecutive seasons. After the
2009–10 campaign, his fourth with Adler Mannheim, Pascal left as a free agent and signed a one-year contract with fellow DEL club, Krefeld Pinguine, on July 27, 2010. On March 20, 2012, Trepanier announced his retirement after 18 professional seasons. ==Personal life==