where are the giant redwoods located in california
Along the coast of northern California
Redwood National and State Parks
The Redwood National and State Parks (RNSP) are a complex of several state and national parks located in the United States, along the coast of northern California. 
wiki:24470104
Redwood National and State Parks [SEP] Introduction
The Redwood National and State Parks (RNSP) are a complex of several state and national parks located in the United States, along the coast of northern California. Comprising Redwood National Park (established 1968) and California's Del Norte Coast, Jedediah Smith, and Prairie Creek Redwoods State Parks (dating from the 1920s), the combined RNSP contain , and feature old-growth temperate rainforests. Located within Del Norte and Humboldt Counties, the four parks, together, protect 45% of all remaining coast redwood ("Sequoia sempervirens") old-growth forests, totaling at least . These trees are the tallest, among the oldest, and one of the most massive tree species on Earth.