Big-wall climber Kevin Jorgeson’s new Santa Rosa gym has 50-foot walls and a soaring mezzanine space for yoga and fitness classes.

Session Climbing is in the homestretch. The 23,500-square-foot climbing and fitness emporium, located a mile south of Santa Rosa’s Courthouse Square, launches this May. And as sunlight streams through the gym’s large windows on a bright afternoon a few weeks before its public debut, another sound is audible over the din of nearby power tools: euphoria.