Excelsior Mountain (Yosemite)  Excelsior Mountain is the 21st-highest mountain in Yosemite National Park, on the northeastern border of Yosemite. It is the next high peak, north of Mount Conness. Excelsior Mountain is mostly made of rust-colored metamorphic rock, similar to Mount Dana, which is also close. All of the following are near, to Excelsior Mountain: