Music lovers with an allergy to jam bands can be excused for assuming that they'll have an adverse reaction to this CD, a live recording cut in Colorado and Oregon. After all, the closing medley of two songs -- one of which is played twice -- clocks in at a hefty 26-plus minutes. But while the disc includes some overt nods to the Dude, Where's My Car? crowd (including a cover of John Hartford's reggaefied "Two Hits and the Joint Turned Brown"), it also sports an air of bluegrass authenticity that extends to instrumentation, arrangements and Jeff Austin's unaffected vocals. On Volume 2, Yonder Mountain emerges as a jam band even jam-band haters can like.