Gneiss (pronounced 'nice') is a metamorphic rock formed at high temperature and pressure and is the type of rock people are most likely to climb in the Okanagan. Gneiss Climbing in Kelowna offers climbing in a safe environment with safety mats. Gneiss also offers Bouldering a sport on its own, and cross train for athletes looking to refine fundamental movement, power, agility and cognitive process.