Where Is the Sierra Nevada? California's Great Mountain Range

The Sierra Nevada is a major mountain range in the western United States, running ~400 miles (640 km) north–south through eastern California, with spurs into western Nevada and southern Oregon.

Key Geography

• North: Fredonyer Pass / Susan River (boundary with Cascades).
• South: Tehachapi Pass (boundary with Transverse Ranges / Mojave).
• West Slope: Gradual, drained by Sacramento/San Joaquin rivers → Central Valley.
• East Escarpment: Steep fault-block drop into Great Basin (Owens Valley, Mono Lake).
• Highest Peak: Mount Whitney (14,505 ft / 4,421 m) — highest in contiguous US.
• Notable Features: Yosemite Valley, Lake Tahoe, Kings Canyon, Sequoia/Kings Canyon NPs, Mammoth Lakes, John Muir Trail, Pacific Crest Trail.

Geology

Granitic batholith (Mesozoic) uplifted by Sierra Nevada Fault (active); heavily glaciated (U-valleys, cirques, moraines).

Climate & Ecology

Mediterranean (wet winter, dry summer) → alpine. Zones: foothill woodland → montane forest (ponderosa, sugar pine, giant sequoia) → subalpine → alpine. 500+ vertebrate species.

Human Significance

• Water tower: 60% of CA's developed water originates here.
• Recreation: 10M+ visitors/yr.
• Indigenous: Paiute, Miwok, Mono, Washoe homelands.

The Sierra Nevada is California's backbone, water tank, and wilderness soul.