Mayacamas Mountains (west)

https://napavalleyregister.com/lifestyles/have-napa-valley-s-mountains-ever-peaked-your-interest/article_d694e23d-5a17-51c4-9870-8f3671e8b6f1.html

Sonoma County CA Peaks List

https://listsofjohn.com/searchres?c=354

 

 

Diamond Mountain, including its peak, is actually in Sonoma County

https://www.govinfo.gov/content/pkg/FR-2001-06-01/pdf/01-13821.pdf

Road Depiction via MapBuilder Overlay

https://caltopo.com/map.html#ll=38.54387,-122.58253&z=15&b=t&o=f%2Cr&n=1,0.25&a=mba

View Shed (Calistoga)

https://caltopo.com/map.html#ll=38.54397,-122.58257&z=17&b=t&o=f%2Cr&n=1,0.25&a=vs_38.5405b-122.5836e5cFF0000&cl=%7B%22cfglayers%22%3A%5B%7B%22properties%22%3A%7B%22title%22%3A%22View%20Shed%22%2C%22alias%22%3A%22vs_38.5405b-122.5836e5cFF0000%22%2C%22class%22%3A%22ConfiguredLayer%22%7D%2C%22id%22%3A%22e9a45b6a-fd9c-48d7-8c14-af3cc22f1d97%22%7D%5D%7D

Diamond Mountain Peak

https://caltopo.com/map.html#ll=38.54103,-122.58245&z=16&b=t&o=f%2Cr&n=1,0.25&a=cf10%2Csf%2Csma%2Cfire%2Csld_today-average

Diamond Mountain Peak: 2375 feet

https://earth.google.com/web/search/2210+Diamond+Mountain+Road,+Calistoga,+CA/@38.54265041,-122.58166681,638.59115679a,242.40264477d,35y,-144.57553207h,77.95946225t,0r/data=CigiJgokCR3pvUtiRUNAEeCHkUurQ0NAGSqnvygkpF7AIbsG7fSPpV7A