On Thursday and Saturday, May 4 and 6, at 8:00pm, Runnicles will conduct Gustav Mahler’s Symphony No. 5, concluding his 22-year tenure as Principal Guest Conductor with a piece he and the orchestra know well, having last performed it together in 2015. “In the two decades of music making together there was no more meaningful journey than exploring the symphonies of Gustav Mahler. This repertoire is in the DNA of the ASO, none more so than the epic Fifth Symphony,” Runnicles recently said.