Bourdon joined the Val-d'Or Foreurs for the 2003–04 season, registering eight points in 64 regular season games and scoring one goal in seven playoff games. He appeared in all 70 games with the Foreurs in 2004–05, scoring 13 goals and 19 assists, and participated in the CHL Top Prospects Game, an exhibition for draft-eligible players. In June 2005, Bourdon was the tenth pick overall, selected by the Vancouver Canucks, at the 2005 NHL Entry Draft. Ranked sixth overall for North American skaters coming into the draft, Bourdon was noted as a physical two-way defenceman with significant offensive skills and a strong shot, as well as an excellent skater. He was the second Shippagan-born hockey player to be drafted in the NHL, after goaltender Yanick Degrace was drafted by the Philadelphia Flyers in 1991.