Located in the center of Sonoma County on the Highway 101 corridor, Cotati is a modern community with strong historic roots, particularly in agriculture and music. Coastal fog often reaches Cotati in the summer, creating a milder and somewhat cooler climate than in neighboring communities. Laid out in the 1890s and covering less than two square miles, Cotati is one of only two towns nationwide (the other is Detroit) with a hexagon street pattern instead of the standard grid. The heart of Cotati is La Plaza Park, a California Historic Landmark. Each year it comes alive with Cajun beats, music with a Spanish flair and much, much more during the Cotati Accordion Festival, the largest event of its type in California.