Stone Lagoon Boat-In Campground offers six primitive environmental campsites accessible only by boat or challenging hiking trail, located at Ryan's Cove within Humboldt Lagoons State Park near Trinidad, California.

Sites cost $20/night on a first-come, first-served basis with minimal amenities (vault toilets, picnic tables, potable water), making it ideal for paddlers and anglers seeking a remote backcountry experience.

Boat access is strongly recommended over hiking due to overgrown trails and fallen trees; kayak rentals are available at the nearby Stone Lagoon Visitor Center, and fishing is permitted using artificial lures with barbless hooks only.