
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 and California's Del Norte Coast, Jedediah Smith, and Prairie Creek Redwoods State Parks, the combined RNSP contain 139,000 acres (560 km2), and feature old-growth temperate rainforests. Located within Del Norte and Humboldt Counties, the four parks, together, protect 45% of all remaining coast redwood old-growth forests, totaling at least 38,982 acres (157.75 km2). These trees are the tallest, among the oldest, and one of the most massive tree species on Earth. In addition to the redwood forests, the parks preserve other indigenous flora, fauna, grassland prairie, cultural resources, portions of rivers and other streams, and 37 miles (60 km) of pristine coastline.

Atlas Grove is a grove of Coast redwood trees within Prairie Creek Redwoods State Park, in Humboldt County, northern California. It contains the third largest known Coast redwood, Iluvatar.

The Bigfoot Trail is an unofficial U.S. long-distance hiking trail in northern California. The Bigfoot Trail was originally proposed by Michael Kauffmann in 2009 as a suggested route to navigate the Klamath Mountains from south to north as well as a long-trail to introduce nature lovers to the biodiversity of the Klamath Mountains region. The trail begins in the Yolla Bolly-Middle Eel Wilderness and ends in Redwood National Park at the Pacific Ocean near Crescent City, California. A major focus along the trail is conifer diversity, passing 32 species in 360 miles (580 km). The route crosses six wilderness areas, one National Park, and one State Park. Northwest California's Klamath Mountains foster one of the most diverse temperate coniferous forests on Earth, and this route is intended to be a celebration of that biodiversity.

Crescent City is the county seat of, and the only incorporated city in, Del Norte County, California. Named for the crescent-shaped stretch of sandy beach south of the city, Crescent City had a total population of 7,643 in the 2010 census, up from 4,006 in the 2000 census. The population includes inmates at Pelican Bay State Prison, also within the city limits, and the former census-designated place Crescent City North annexed to the city. The city is also the site of the Redwood National Park headquarters, as well as the historic Battery Point Light. Due to the richness of the local Pacific Ocean waters and the related catch, and ease of access, Crescent City Harbor serves as home port for numerous commercial fishing vessels.

Del Norte Coast Redwoods State Park is a state park of California, USA, and a component of the Redwood National and State Parks. The property is about half old-growth forest of coast redwoods and includes 8 miles (13 km) of wild Pacific coastline. The park was significantly expanded in 2002 with the 25,000-acre (10,000 ha) Mill Creek Addition. Originally established in 1925, the park is now 31,261 acres (12,651 ha). The park was designated part of the California Coast Ranges International Biosphere Reserve in 1983.

Del Norte Titan is a coast redwood tree in Del Norte County, Northern California, that was confirmed by measuring to be at least 23.7 feet (7.2 m) in diameter at breast height, and 307 feet (94 m) tall. Measured by botanist Stephen Sillett, it ranks as the world's fifth largest coast redwood. One source recognizes it as the largest based on a single-stem measurement. But the source's recognition pre-dates a 2014 discovery in the redwood parks that is larger. Lost Monarch in the same park, is actually larger with more wood volume than Del Norte Titan, if basal stems are included. The fourth largest coastal redwood is in Prairie Creek Redwoods State Park called Iluvatar.

Fern Canyon is a canyon in the Prairie Creek Redwoods State Park in Humboldt County, California, western United States. The park is managed in cooperation with other nearby redwoods state parks and Redwood National Park. It is named for the ferns growing on the 50-foot high walls, through which runs Home Creek. Fern Canyon is recognized as a World Heritage site and an International Biosphere Reserve.
Freshwater Lagoon is the northernmost and smallest of three similar lagoons within Humboldt Lagoons State Park, along the coast of Humboldt County, California.

The Grove of Titans is a redwood grove in Del Norte County, Northern California, with several massive coast redwood trees, some of the largest known redwoods in terms of wood volume. The largest coastal redwood tree in the grove by volume is the single-stem Del Norte Titan. The Lost Monarch is comparably large, but a large sprout from the ground at its base is not part of the main trunk structure.

Iluvatar is a redwood tree in Prairie Creek Redwoods State Park in Northern California that has been confirmed to be at least 20.5 feet (6.2 m) in diameter at breast height, and 320 feet (98 m) in height. Measured by botanist Stephen C. Sillett, it is the world's third-largest coast redwood, the largest being Lost Monarch.
Jedediah Smith Redwoods State Park is a state park of California, United States, preserving old-growth redwoods along the Smith River. It is located along U.S. Route 199 approximately 9 miles (14 km) east of Crescent City. The park is named after explorer Jedediah Smith, and is one of four parks cooperatively managed as Redwood National and State Parks. The 10,430-acre (4,220 ha) park was established in 1939 and designated part of the California Coast Ranges International Biosphere Reserve in 1983.

The Klamath River flows 257 miles (414 km) through Oregon and northern California in the United States, emptying into the Pacific Ocean. By average discharge, the Klamath is the second largest river in California after the Sacramento River. It drains an extensive watershed of almost 16,000 square miles (41,000 km2) that stretches from the arid country of south-central Oregon to the temperate rainforest of the Pacific coast. Unlike most rivers, the Klamath begins in the high desert and flows toward the mountains – carving its way through the rugged Cascade Range and Klamath Mountains before reaching the sea. The upper basin, today used for farming and ranching, once contained vast freshwater marshes that provided habitat for abundant wildlife, including millions of migratory birds. Most of the lower basin remains wild, with much of it designated wilderness. The watershed is known for this peculiar geography, and the Klamath has been called "a river upside down" by National Geographic magazine.

Klamath is an unincorporated, rural, census-designated place (CDP) in Del Norte County, California, situated on US Route 101 inland from the mouth of the Klamath River. The population was 779 at the 2010 census, up from 651 at the 2000 census. Klamath is at an elevation of 30 feet.

Lost Monarch is a coast redwood tree in Northern California that is 26 feet (7.9 m) in diameter at breast height, and 320 feet (98 m) in height. It is the world's fifth largest coast redwood in terms of wood volume.

The Northern California coastal forests are a temperate coniferous forests ecoregion of coastal Northern California.

Prairie Creek Redwoods State Park is a state park, located in Humboldt County, California, near the town of Orick and 50 miles (80 km) north of Eureka. The 14,000 acre (57 km²) park is a coastal sanctuary for old-growth Coast Redwood trees.
Redwood Creek is a 61.8-mile (99.5 km) river in Humboldt County, California. The river's headwaters are in the Coast Range at about 5,000 feet (1,500 m) and it flows roughly northwest until it empties into the Pacific Ocean near the small town of Orick, the only development in the 280-square-mile (730 km2)-watershed.

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 and California's Del Norte Coast, Jedediah Smith, and Prairie Creek Redwoods State Parks, the combined RNSP contain 139,000 acres (560 km2), and feature old-growth temperate rainforests. Located within Del Norte and Humboldt Counties, the four parks, together, protect 45% of all remaining coast redwood old-growth forests, totaling at least 38,982 acres (157.75 km2). These trees are the tallest, among the oldest, and one of the most massive tree species on Earth. In addition to the redwood forests, the parks preserve other indigenous flora, fauna, grassland prairie, cultural resources, portions of rivers and other streams, and 37 miles (60 km) of pristine coastline.

Save the Redwoods League is a nonprofit organization whose mission is to protect and restore coast redwood and giant sequoia trees through the preemptive purchase of development rights to notable areas with such forests.

Sequoia sempervirens is the sole living species of the genus Sequoia in the cypress family Cupressaceae. Common names include coast redwood, coastal redwood and California redwood. It is an evergreen, long-lived, monoecious tree living 1,200–1,800 years or more. This species includes the tallest living trees on Earth, reaching up to 379 feet (115.5 m) in height and up to 29.2 feet (8.9 m) in diameter at breast height (dbh). These trees are also among the oldest living things on Earth. Before commercial logging and clearing began by the 1850s, this massive tree occurred naturally in an estimated 2,000,000 acres (810,000 ha) along much of coastal California and the southwestern corner of coastal Oregon within the United States.

The Smith River is a river flowing from the Klamath Mountains to the Pacific Ocean in Del Norte County in extreme northwestern California, on the West Coast of the United States. It is about 25.1 miles (40.4 km) long, all within Del Norte County, and it flows through the Rogue River – Siskiyou National Forest, Six Rivers National Forest, and Jedediah Smith Redwoods State Park.

Stone Lagoon is the second of three similar lagoons within Humboldt Lagoons State Park, along the coast of Humboldt County, California.