Now you can Book Spa Appointments Online! Click below to book ahead of time to make sure you get the time and treatment you desire. or call Ascent Spa at 559-692-8954 or contact Tenaya's Concierge via email. Ascent Spa at Tenaya Lodge® Set against the inspiring backdrop of Yosemite National Park and the Sierra Nevada range, Ascent Spa at Tenaya Lodge® is a new destination where guests can reach elevated levels of relaxation and rejuvenation. This luxurious Northern California spa creates bliss via 12 treatment rooms for massages, facials and body treatments, all of which are intended to nourish, heal, relax and protect. It is the ideal retreat after an extended day exploring the park, hiking the surrounding woods or skiing snowy slopes. The 10,000-square-foot spa also offers dry saunas, steam rooms and an enhanced wellness center featuring cardio stations and strength training equipment.