California, United States
Mount Sill is one of the fourteeners of the Sierra Nevada in California. It is located in the Palisades, a group of striking rock peaks with a few small glaciers on their flanks. Mount Sill is located 0.6 miles (1 km) east of North Palisade, the high point of the group. The two peaks are connected by a high, rocky ridge, on the north side of which lies the Palisade Glacier. Mount Sill lies on the main Sierra Crest, but is at a point where the crest turns sharply, giving it particularly striking summit views. On one side is Kings Canyon National Park in Fresno County; on the other is Inyo National Forest in Inyo County.
Routes on Mount Sill are found on all sides of the peak and range in difficulty from scrambles (Class 2-3) to moderately technical rock climbs (Yosemite Decimal System 5.7).
The mountain is called Nen-i-mish ("the Guardian of the Valley") by the indigenous Northern Paiute people.
Its English name was coined by Joseph LeConte in 1904, in honor of poet Edward Rowland Sill.