During their heyday, 3 Track Mind opened for names such as John Hiatt, Joan Baez, and Rosanne Cash, and sold out the stage of the Mount Baker Theatre performing their debut album “Mighty Big Therapy.” Now, every member of this beloved supergroup is a prolific solo artist, and they’ve reunited after nearly three decades for a small series of shows. Mount Baker Theatre, 104 N. Commercial St., Bellingham, 360.734.6080, mountbakertheatre.com