Park map: parks.sonomacounty.ca.gov/uploadedFiles/Parks/Get_Outdoors/Parks/sonoma_valley_regionalpark_map.pdf
$7 parking fee (lasts the entire day)
The park trails are on-leash. There is, however, a large fenced dog park where dogs are allowed to run free off-leash.
The gathering place will be at the dog park gate closest to the parking lot entrance. From there we can walk around the larger park on-leash and then linger off-leash inside the dog park.
If needed, my cell is 415-408-8732