Where was the grassland on the Windows XP desktop taken?

Taken in Wine County, California, USA.

Introduction to this photo:

This photo adopted by Windows XP has no PS trace, and it is a real-life map. Photographed in Wine County, California, USA. 1996, Charles O'Rear, a photographer of Gome Geographic magazine, drove by here to meet his girlfriend and took this photo. 200110/on October 25th, a new generation of Microsoft desktop operating system Windows XP was released, which became the most successful desktop operating system in a short time. This clean and bright photo named Bliss by XP is also deeply rooted in people's hearts.