Trinidad Head, California

Trinidad Head
Only a narrow spit connects Trinidad Head (upper right) to the mainland
Location	Trinidad Harbor, near Trinidad, California
Coordinates
California Historical Landmark
Reference no.	146
Location of Trinidad Head in California

Trinidad Head (Yurok: Chuerewa' ) is a rocky promontory surrounded by sea stacks sheltering Trinidad Harbor, adjacent to the town of Trinidad in Humboldt County, California, USA, designated as California Historical Landmark #146.

History

On 9 June 1775, two Spanish Naval explorers, Bruno de Heceta and Juan Francisco de la Bodega y Quadra anchored in Trinidad Bay. Two days later, on Trinity Sunday, 11 June 1775, Trinidad Head was claimed for Spain in the name of Charles III by Heceta, his men and two Franciscan fathers who erected a cross on the summit. When Sebastian Rodriguez Cermeno, Captain of the Portuguese ship "San Augustin," discovered and entered the Trinidad Bay in November of 1595, he did not anchor for fear of hitting submerged rocks. Over the next 75 years, Spanish, Russian and British ships landed at Trinidad Head for sea otters, fresh water and refuge from storms.

The harbor and Trinidad Head were mapped as part of A.D. Bache's United States Coast Survey under the direction of Lieutenant Commander William P. McArthur.

Geology

Trinidad Head is composed of metamorphosed gabbro embedded in the surrounding Franciscan melange, topped with Pleistocene sands and gravels.

Observatories

• The Trinidad Head Lighthouse was built 1871 and remains in operation.
• Trinidad Head Observatory of the National Oceanic and Atmospheric Administration began operation in 2002, monitoring regional and global meteorology.
• NASA's Advanced Global Atmospheric Gases Experiment began on Trinidad Head in 1995 and was updated to a system which can measure more than 40 trace gases in May 2005.