Mount Dana is a mountain in the U.S. state of California. Its summit marks the eastern boundary of Yosemite National Park and the western boundary of the Ansel Adams Wilderness. At an elevation of 13,061 feet, it is the second highest mountain in Yosemite, and the northernmost summit in the Sierra Nevada which is over 13,000 feet in elevation. Mount Dana is the highest peak in Yosemite that accessible to summit.