Frary Peak is the high point of Antelope Island, the largest island in the Great Salt Lake . The trails starts near the great Salt Lake and climbs to 6,596 to the summit of the peak. This is one of the great views while traveling the trail. There are many interesting features of Antelope Island and Frary Peak that make the trip worthwhile. For geology buffs, Frary Peak has some of the oldest rocks on earth, at 2.7 billion years old. Interestingly, some of the youngest non-volcanic rocks also reside on the island. The tufa rocks were deposited by lake Bonneville 10,000 to 15,000 years ago.