Big Lagoon is the southernmost and largest of three similar lagoons within Humboldt Lagoons State Park, along the coast of Humboldt County, California. It is located between Trinidad to the south and Orick at the mouth of Redwood Creek to the north.
The lagoons are shallow bays between rocky headlands where coastal wave action has formed a sandy bar separating each lagoon from the Pacific Ocean. The lagoons are resting areas for migratory waterfowl using the Pacific Flyway between Lake Earl on the Smith River estuarine wetlands 40 miles to the north and Humboldt Bay on the Mad River estuarine wetlands 30 miles to the south.
In August of 2014, the Young Men went kayaking at Big Lagoon. A guide took them across the lagoon and up a creek. They stopped a few times along the creek to try to find some elk. They didn't find any, so they continued across the lagoon to a beach. After making their way back to their starting point, the guide made them practice falling out of the kayaks and climbing back in.