The Yosemite Mountaineering School and Guide Service has been in Yosemite, rock climbing since 1969.
Their guides can help you out to take your first steps, from learning your first knots in their beginner Go Climb A Rock classes, to multi-day ascents of El Capitan for the more experienced.
They are the only guide service permitted to operate within Yosemite National Park.
Many of their climbing guides are AMGA certified, and have many years of climbing experience in the park. Their guides also hold Wilderness First Responder or Wilderness EMT certifications.
P.O. Box 578, Yosemite National Park, CA 95389