Title: Sequoiadendron giganteum
Content:  The best site to see Giant Redwoods in New Zealand is at Rotorua. The six hectare stand of Californian Redwoods is named the Redwood Memorial Grove and is protected from tree harvesting. Redwoods can also be found near Lake Rotokakahi (the Green Lake) and in various other spots within the forest. But none of them are as magnificent as those in the Redwood Memorial Grove. They were planted in the early 1900s as part of experiments to determine suitable trees for commercial growing in New Zealand.
Title: Redwood Mountain Grove
Content:  Redwood Mountain Grove is the largest grove of giant sequoia (Sequoiadendron giganteum) trees on earth. It is located in Kings Canyon National Park and Giant Sequoia National Monument on the western slope of California's Sierra Nevada. The grove contains the world's tallest giant sequoia (95 m). The Hart Tree and Roosevelt Tree grow in the grove and are two of the 25 largest trees by volume in the world. The largest tree is the General Sherman Tree in the Giant Forest grove to the southeast.
Title: North Coast (California)
Content:  grandeur of the redwoods can be experienced throughout the region, from the protected groves of Muir Woods National Monument and Armstrong Redwoods State Natural Reserve in the south to the massive forests of Humboldt Redwoods State Park along the Avenue of the Giants in the north. Redwoods are also found in many other State and local parks, most of which are located along Highway 101 throughout the far North Coast. Other larger redwood parks include Prairie Creek Redwoods State Park, Del Norte Coast Redwoods State Park, Jedediah Smith Redwoods State Park and Redwood National and State Parks. In total, the redwood parks of the North Coast contain the vast majority of all remaining old-growth redwoods.
Title: Sequoiadendron giganteum
Content:  Sequoiadendron giganteum (giant sequoia; also known as giant redwood, Sierra redwood, Sierran redwood, Wellingtonia or simply big treea nickname also used by John Muir ) is the sole living species in the genus Sequoiadendron, and one of three species of coniferous trees known as redwoods, classified in the family Cupressaceae in the subfamily Sequoioideae, together with Sequoia sempervirens (coast redwood) and Metasequoia glyptostroboides (dawn redwood). Giant sequoia specimens are the most massive trees on Earth. The common use of the name sequoia usually refers to Sequoiadendron giganteum, which occurs naturally only in groves on the western slopes of the Sierra Nevada mountain range of California. The giant sequoia is listed as an endangered species by the IUCN, with fewer than 80,000 trees remaining. 
Title: Redwood National and State Parks
Content:  the southern Oregon Coast. The tree is closely related to the giant sequoia of central California, and more distantly to the dawn redwood which is indigenous to the Sichuan–Hubei region of China. Coast redwoods are the tallest trees on Earth; as of September 2006, the tallest tree in the park was Hyperion at 379.1 ft, followed by Helios and Icarus which were 376.3 ft and 371.2 ft respectively. Before September 2006, the tallest living specimen known was the Stratosphere Giant, outside the park in Humboldt Redwoods State Park, which was 370 ft in 2004. For many years, one specimen simply named 
Title: Redwood Mountain Grove
Content:  The Redwood Mountain Grove contains the most giant sequoia trees within its area. The area has old-growth giant sequoia groves and other distinctive natural features of the forest for visitors to view and experience. The Redwood Mountain Grove is protected primarily within Kings Canyon National Park, and in Giant Sequoia National Monument.
Title: Sequoia sempervirens
Content:  Sur area of Monterey County, California. The southernmost grove is in the Southern Redwood Botanical Area, just north of the national forest's Salmon Creek trailhead and near the San Luis Obispo County line. The largest (and tallest) populations are in Redwood National and State Parks (Del Norte and Humboldt counties) and Humboldt Redwoods State Park (Humboldt County, California), with the majority located in the much larger Humboldt County. The prehistoric fossil range of the genus is considerably greater, with a subcosmopolitan distribution including Europe and Asia until about 5 million years ago. During the last ice age, perhaps as recently as 10,000 years ago, redwood trees grew as far south as the Los Angeles area (coast redwood bark found in subway excavations and at La Brea tar pits).
Title: Humboldt Redwoods State Park
Content:  Humboldt Redwoods State Park is a state park of California, United States, containing Rockefeller Forest, the world's largest remaining contiguous old-growth forest of coast redwoods. It is located 30 mi south of Eureka, California, near Weott in southern Humboldt County, within Northern California, named after the great nineteenth-century scientist, Alexander von Humboldt. The park was established by the Save the Redwoods League in 1921 largely from lands purchased from the Pacific Lumber Company. Beginning with the dedication of the Raynal Bolling Memorial Grove, it has grown to become the third-largest park in the California State Park system, now containing 51651 acre through acquisitions and gifts to the state. It is part of the Northern California coastal forests ecoregion and has 23600 acre of old-growth forests. 17000 acre are old-growth redwoods, comprising the entire Bull Creek watershed and the Rockefeller Forest. Nearby U.S. Route 101, which generally follows the Eel River and its South Fork in this part of the North Coast, offers easy access to the park and nearby towns with connections to the scenic highway, Avenue of the Giants, also mostly located within or near park boundaries.
Title: List of largest giant sequoias
Content:   Giant sequoias occur naturally in only one place on Earth—the western slope of the Sierra Nevada mountain range in California, on moist, unglaciated ridges and valleys at an altitude of 5000 to 8000 ft above mean sea level. There are 65–75 groves of giant sequoias in the Sierra Nevada, depending upon the criteria used to define a grove. The northernmost of these groves is Placer County Grove in the Tahoe National Forest, Placer County, California, while the southernmost grove is Deer Creek Grove in the Giant Sequoia National Monument, Tulare County, California. The combined total area of all groves of giant sequoias is approximately 35600 acre.
Title: Giant Forest
Content:  The Giant Forest, famed for its giant sequoia trees, is within the United States' Sequoia National Park. This montane forest, situated at over 6000 ft above mean sea level in the western Sierra Nevada of California, covers an area of 1880 acre. The Giant Forest is the most accessible of all giant sequoia groves, as it has over 40 mi of hiking trails. Five of the ten most massive trees on Earth are located within the Giant Forest. The largest of these, named General Sherman, measures 36.5 ft across the base. The giant sequoia is the world's most massive species of tree and is one of the six species documented to grow to 300 ft in height; the others are coast redwood, yellow meranti, Eucalyptus regnans, Douglas fir, and Sitka spruce. It is also among the longest-lived of all trees in the world.

Question: where are the giant redwoods located in california?
Answer: Humboldt County.
Del Norte County.
the coast of northern California.