Mount Linn, at 8094 feet (2,467.1 m), is the easternmost summit on South Yolla Bolly Mountain, and is located in the Northern Coast Ranges of California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

 in the Yolla Bolly-Middle Eel Wilderness

Yolla Bolly-Middle Eel Wilderness

The Yolla Bolly-Middle Eel Wilderness is a federally designated wilderness area located west of Red Bluff in the state of California. Created by the Wilderness Act of 1964, the land area was originally ....

. The summit is the highest point in the Northern Coast Ranges south of the Trinity Alps

Trinity Alps

The Trinity Alps are mountains in Northern California, in the Pacific Coast Ranges physiographic region, located to the northwest of Redding. Elevations there range from to at Thompson Peak. The Trinity Alps Wilderness covers , making it the second largest wilderness area in California...

 of the Klamath Mountains

Klamath Mountains

The Klamath Mountains, which include the Siskiyou, Marble, Scott, Trinity, Trinity Alps, Salmon, and northern Yolla-Bolly Mountains, are a rugged lightly populated mountain range in northwest California and southwest Oregon in the United States...

. The elevation of the mountain allows it to receive heavy winter snowfall and it has low average annual temperature near the summit.

A tarn

Tarn (lake)

A tarn is a mountain lake or pool, formed in a cirque excavated by a glacier. A moraine may form a natural dam below a tarn. A corrie may be called a cirque.The word is derived from the Old Norse word tjörn meaning pond...

 named Square Lake

Square Lake

Square Lake is a tarn located in a cirque north of Mount Linn in the northern California Coast Ranges, in Tehama County, California.Square Lake lies at an elevation of about . Like its name states, the lake has straight shorelines that make the shape of the lake resemble a square....

 is located in a cirques

Cirque (landform)

thumb|250 px|Two cirques with semi-permanent snowpatches in [[Abisko National Park]], [[Sweden]].A cirque or corrie is an amphitheatre-like valley head, formed at the head of a valley glacier by erosion...

 on Mount Linn's north slope.
The cirques was carved by glaciers during the Ice Age

Ice age

An ice age or, more precisely, glacial age, is a generic geological period of long-term reduction in the temperature of the Earth's surface and atmosphere, resulting in the presence or expansion of continental ice sheets, polar ice sheets and alpine glaciers...

.

The mountain was named by John C. Frémont

John C. Frémont

John Charles Frémont , was an American military officer, explorer, and the first candidate of the anti-slavery Republican Party for the office of President of the United States. During the 1840s, that era's penny press accorded Frémont the sobriquet The Pathfinder...

 in honor of Lewis F. Linn

Lewis F. Linn

Lewis Fields Linn was a Jacksonian Democratic U.S. Senator for the state of Missouri born in Kentucky. He served in that role from 1833 to 1843. Four states named counties in his honor: Iowa, Kansas, Missouri, and Oregon. West Linn, Oregon and Linnton, Oregon also get their name from the ex-senator...

, a senator from Missouri, who played an important roll in the acquisition of the Oregon Territory

Oregon Territory

The Territory of Oregon was an organized incorporated territory of the United States that existed from August 14, 1848, until February 14, 1859, when the southwestern portion of the territory was admitted to the Union as the State of Oregon. Originally claimed by several countries , the region was...

.