Trinity Alps
Overview
 
The Trinity Alps are mountains in Northern California
Northern California
Northern California is the northern portion of the U.S. state of California. The San Francisco Bay Area , and Sacramento as well as its metropolitan area are the main population centers...

, in the Pacific Coast Ranges
Pacific Coast Ranges
The Pacific Coast Ranges and the Pacific Mountain System are the series of mountain ranges that stretch along the West Coast of North America from Alaska south to Northern and Central Mexico...

 physiographic region
Physiographic regions of the world
The physiographic regions of the world are a means of defining the Earth's landforms into distinct regions based upon classic 1916 three-tiered approach defining divisions, provinces, and sections...

, located to the northwest of Redding
Redding, California
Redding is a city in far-Northern California. It is the county seat of Shasta County, California, USA. With a population of 89,861, according to the 2010 Census...

. Elevations there range from 1350 feet (411 m) to 8994 ft (2,741 m) at Thompson Peak. The Trinity Alps Wilderness covers 517000 acres (2,092.2 km²), making it the second largest wilderness area in California. The area was formerly known as the Salmon-Trinity Alps Primitive Area since 1932 until a series of expansions.
 
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