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 east of Crescent City, and is one of four parks cooperatively managed as Redwood National and State Parks. The 10,430-acre park was established in 1939 and designated part of the California Coast Ranges International Biosphere Reserve in 1983.
The park was named after explorer Jedediah Smith, who was the first American to travel, by land, from the Mississippi River to California in 1826, passing through the area of the future park.
The park consists of 9,500 acres of redwood trees, including several groves of old growth trees. One of the groves, totaling 5,000 acres, includes the world's largest (not tallest) coast redwood, which measures 20 feet in diameter and 340 feet tall.
The Smith River, which flows through the park, is home to rainbow trout and salmon, black bears, black-tailed deer, squirrels, chipmunks, raccoons and other mammals.
The Smith River is the last major undammed river in California. Within the park, the river is rather undisturbed and holds the state record for the largest steelhead rainbow trout, weighing over 27 pounds.