Humboldt Redwoods Interpretive Association

The Humboldt Redwoods Interpretive Association (HRIA) is a 501(c) non-profit, providing volunteer-run Visitor Centers at four State Parks in Humboldt County. We hope that you will stop by to get information about hikes, directions, ecology, history, as well as maps, brochures, books, and souvenirs. We strive to connect visitors and the community to the incredible Redwood Forest, in hopes of spreading appreciation and a passion for the conservation of the tallest trees in the world.

Visitor Centers


Humboldt Redwoods State Park
California's 3rd largest state park, with over 53,000 acres, and the largest old growth contiguous redwood forest in the world! Drive along the 32 mile Avenue of the Giants to explore Humboldt Redwoods State Park, and come by the Visitor Center between 10:00-4:00 between the towns of Weott and Myers Flat. For more specific information about the parks, call us at (707) 946-2263.


Richardson Grove State Park
Come explore one of the first redwood parks - with 1,800 acres, campgrounds, trails, and the Eel River, theres lots to enjoy! Located along Highway 101, 200 miles north of San Francisco. Campground open year round, and the newly remodeled Visitor Center opening this upcoming summer! For more specific information about the parks, call us at (707) 247-3318.

Grizzly Creek Redwoods State Park
This state park gem is tucked away on Highway 36, nestled in the redwoods and next to the Van Duzen River. Campground and Visitor Center open all year, with Junior Ranger and campfire programs during the summers! For more specific information about the parks, call us at (707) 777-3683.

Sinkyone Wilderness State Park
Explore the beautiful southern portion of the Lost Coast at Sinkyone Wilderness State park. See Grey Whale migrations, Sea Lions, Roosevelt Elk, and much much more! No potable water available, and 4-wheel drive recommended during the rainy season (Fall through early Spring). Primitive and spectacular! For more specific information about the parks, call us at (707) 247-3318
Camping reservations are strongly recommended. Reservations for all California State Parks are available only through Reserve America at 1-800-444-PARK (7275)


Welcome to Humboldt Redwoods State Park

Located along the Eel River in northern California, Humboldt Redwoods State Park contains some of the world's most majestic ancient redwood groves. The park encompasses over 53,000 acres, including 17,000 acres of old-growth coast redwoods. In 1921 Save the Redwoods League dedicated the first Memorial Grove, Colonel Raynal C. Bolling Memorial Grove, in what is now known as Humboldt Redwoods State Park. Today the park contains a diverse coast redwood ecosystem, which includes Rockefeller Forest, the largest remaining old-growth forest in the world, and the entire Bull Creek watershed.

With more than 250 camp sites, 100 miles of hiking, biking, and riding trails, and the scenic 32-mile Avenue of the Giants, Humboldt Redwoods State Park offers something for everyone. Whether you have just a single day to visit or a week long vacation to explore, a journey into the redwood forest is sure to be an awe-inspiring experience. The park is open year 'round and recreational activities are available throughout the four seasons.

Time lapse trip down the Avenue of the Giants

Video by David Wilson, Music by Jerren Wilson