Rockhounding Humboldt County, California: 12 Places To Hunt Rocks, Crystals, and Fossils

If you are looking for some of the best places to hunt for rocks, crystals, and fossils in California, look no further than Humboldt County.

This wild and rugged county is known for its incredible beauty and abundance of natural resources, including a wide variety of rocks, minerals, and crystals.

This article will provide information on some of the best rockhounding locations in Humboldt county.

Rockhounding Humboldt County (Let’s Go)


The information provided in this article by is for informational purposes and is subject to change. Laws are updated. Accessibility guidelines and restrictions change. Be sure to confirm the land status and collection rules before you travel to an unfamiliar location or collect any material.

1. The Lost Coast

The Lost Coast is one of the most beautiful and remote areas in all of California, and it is a haven for rockhounds searching for agates, jaspers, and other types of beach stones.

The best time to visit is during low tide when you can explore the rocky shoreline for treasures.

However, please be aware that this area can be dangerous due to the large waves and strong currents, so remember to always heed the warnings of park rangers and stay safe.

2. The Lacks Creek District

The Lacks Creek District is home to some of the most abundant and diverse deposits of minerals in all of California.

Located approximately 20 miles northeast of Eureka, this area is especially well-known for its amethyst crystals.

However, you can also find many other minerals such as jade, opal, agate, and petrified wood.

There are several active mines in the area that allow rockhounds to pay a fee to dig for their own crystals, or you can simply search the tailings piles for some free finds.

3. Bald Hills Road

Bald Hills Road is a popular spot for rockhounding in Humboldt County due to the abundance of agates, siltstone, and petrified wood that can be found in the area.

This road is located in a remote and rugged part of the county, so it is important to be prepared for your visit.

4-wheel drive is recommended, and you should always carry plenty of food and water with you as there are no services available in this remote area.

The road is known for being narrow and windy, so driving recreational vehicles or pulling a trailer in this area is not recommended.

4. Cape Mendocino Beach

Cape Mendocino is known for being the westernmost point in all of California, but it is also an excellent spot for rockhounding.

Just over an hour’s drive from Humboldt County, this area is especially well-known for its agates, jasper, and petrified wood.

The best time to visit is during low tide, though be aware that the waves can be quite dangerous in some areas.

When visiting the Cape Mendocino Beach area, remember there are no facilities available for guests.

There is free street parking on Mattole Road, though rockhounds should be prepared to make the two-mile hike to the beach access area.

5. Humboldt Lagoons State Park

Humboldt Lagoons State Park is a beautiful spot for rockhounding, especially if you are interested in finding agates, jade, and jaspers.

This state park is located at the mouth of the Eel River and consists of three freshwater lakes: Big Lagoon, Stone Lagoon, and Freshwater Lagoon.

There are also several miles of coastline that offer excellent opportunities for beachcombing.

The best time to visit is during the summer when the water levels are at their lowest, and you can access more of the shoreline.

6. The Avenue of the Giants

The Avenue of the Giants is a 31-mile scenic drive that winds through some of the most beautiful redwood forests in all of California.

This area is also home to some excellent rockhounding opportunities, including agates and petrified wood deposits.

There are turn offs and parking areas located along the stretch of road where visitors can park for free to enjoy the scenery or search for rocks.

The best time to visit is when the wildflowers are in bloom during the spring.

7. Moonstone Beach

Moonstone Beach is a beautiful spot for rockhounding located just south of Crescent City.

This beach is known for its large deposits of moonstone, but you can also find a variety of other rocks, minerals, and crystals here as well.

There are hidden caves for visitors to explore, free parking, and facilities.

The best time to visit is during low tide, though guests should bring layers of clothing for any unexpected weather changes.

8. The Mad River

The Mad River is a beautiful river that flows through some of the most rugged and remote areas of Humboldt County.

This area is known for its excellent rockhounding opportunities, including deposits of jasper, bementite, and rhodochrosite.

Dogs are allowed to visit the park while on a leash, and there are no fees to park or enter the area.

The physical location is just 5 miles northwest of Arcata, with clearly marked signs to make finding the beach easy.

9. Trinidad State Beach

Trinidad State Beach is a beautiful beach located just north of Fort Bragg.

This beach is known for its large deposits of agates, driftwood quartz crystals, and chalcedony.

It’s important to note there is limited parking available during some times at this location.

Dogs are allowed at this pet-friendly beach, and there are facilities like restrooms and picnic areas provided throughout the area.

The best time to visit is during low tide or during the spring when the wildflowers are in bloom.

10. The Eel River

The Eel River is a beautiful river that flows through rugged areas of Humboldt County, with the area’s unstable geology attracting rockhounds from across the country.

The watershed consists of underlain rocks and minerals that date back to the Late Jurassic Period and is now considered one of the seismically active areas in the entire state.

Visitors can expect to find jade, chrysoprase, and green chalcedony, making it a truly unique spot.

The river is open year-round, though it sometimes closes during the month of October for low water levels.

11. The Arcata Bottoms

The Arcata Bottoms is a large area of wetlands located just south of the city of Arcata.

This area is known for its excellent rockhounding opportunities and features incredible views of the Pacific Ocean.

While birdwatching is a popular sport here, the Arcata Bottoms is also home to a variety of rocks, minerals, and crystals.

Many rockhounds suggest visiting this area from mid-July to early May.

12. The Klamath River

The Klamath River is a unique and beautiful river that flows through the heart of the Klamath Mountains.

This area is known for its excellent rockhounding opportunities, including deposits of driftwood, agate, and petrified wood.

There is free parking available at this location, though it’s important to note that no recreational vehicles or trailers are allowed past the campground.

There are facilities available for guests, but be sure to watch the tide levels that sometimes flood out the main hiking route.

The locations listed are just a sampling of the excellent rockhounding opportunities that can be found in Humboldt County.

Whether you’re interested in finding rocks, crystals, or fossils, there is something for every rockhound here. Have fun and happy hunting!

California Rockhounding Resources

If you like to have a physical book in hand (like when there’s no cell service), here’s a few popular options:

Rockhounding California: A Guide To The State’s Best Rockhounding Sites

Gem Trails of Southern California

Gem Trails of Northern California

Smithsonian Rocks and Minerals Identification Guide

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