- Arcata is a city located in Humboldt County, California, United States. It is situated on the North Coast region of the state, about 280 miles north of San Francisco. Arcata is known for its progressive and environmentally conscious community, as well as its proximity to the beautiful redwood forests and Pacific Ocean. The city is home to Humboldt State University, which contributes to its youthful and vibrant atmosphere. Arcata offers a range of outdoor activities, including hiking, biking, and kayaking, while also hosting cultural events and festivals throughout the year.