t may never come close to Montreal, but Vancouver is building itself quite an indie-rock scene. The city already has a deservedly high-esteemed indie-rock collective in the New Pornographers, some stellar groups like The Pack A.D. and Immaculate Machine, and now they've also got Black Mountain. Despite all the noise they've been making in alternative circles, Black Mountain's musical sensibility is very much rooted in classic rock, specifically drug-addled bands like Pink Floyd and Jefferson Airplane. These guys know how to stretch out a song to seven and eight minutes without boring you, which is a tough feat. And they're even better live. Expect a horn-rimmed outdoorsman's wet dream coupled with dirge sublimity. Check them out Friday at Le National.