CA California Porch

Almanac note · History and culture

Estancia Park keeps Costa Mesa's old adobe layer in view

Estancia Park pairs a regular neighborhood park with the Diego Sepulveda Adobe, a restored 1820 structure tied to the area's old cattle-ranch layer.

Costa MesaEstancia ParkDiego Sepulveda Adobe

Costa Mesa is often read through newer landmarks: South Coast Plaza, the arts district, the fairgrounds, busy streets, and the beach cities nearby. Estancia Park gives the city an older layer that is easy to miss if you only pass through on Harbor Boulevard or the 55.

The park is named for the Estancia Adobe, also known as the Diego Sepulveda Adobe. “Estancia” reaches back to the cattle-ranch use tied to the mission and rancho period. The original adobe was built on the site in 1820, long before Costa Mesa became a modern Orange County city. The restored building now sits inside a park that still works like a local green space.

The charm is how easily the pieces sit together. You can have a picnic, walk the grass, or bring kids to the park, and still be standing near one of the oldest stories in the area. It is not a giant museum stop with a big parking-lot feeling. It is a small place where the city quietly keeps part of its early map visible.

If you are trying to understand Costa Mesa, this stop balances the shopping-and-arts image with something older and more local. The mesa was here before the freeways, before the mall, and before the fairgrounds became such a familiar landmark.

Where to see it

Estancia Park at 1900 Adams Avenue in Costa Mesa.

Official sources

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Reviewed July 5, 2026

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