Adobe State Historic Park was the main residence of Rancho Petaluma, the 66,000-acre agricultural empire of General Mariano Guadalupe Vallejo
, one of the most powerful men in the Mexican Province of California from 1834 to 1846. The general ran his cattle, hide and tallow business, raised sheep, bred horses and grew numerous crops. The adobe contains authentic furniture and exhibits depicting early rancho life. The park has shaded picnic areas with views of farmland and oak studded hills.
The historic park is located at the east edge of Petaluma, off Hwy 116 and 3325 Adobe Road.