I live in the Bay Area and I know there is Pigeon Point Lighthouse which is a dark sky spot but I think it's often cloudy. If anyone has better suggestions would be grateful to hear those.
There are rest stops on 280 (just south of 92) that (at least used to) host telescope parties: https://maps.app.goo.gl/vWEkH1bSvaUZKZHS8. You can definitely see the Milky Way from there, but remember it'll take 30 minutes to acclimate your eyes: tell your kids to stay off their phones (!). You're behind the San Andreas range to block out a lot of the peninsula light pollution, and you've got the coastal range holding back the fog (at least most of the time). Less moon is (much) better, and use a satellite tracker to have something else to watch out for.
This also has an advantage that it's dry and so you don't get clouds as much.
Though, specifically for the Milky Way: https://darksitefinder.com/how-to-see-the-milky-way/
If you live in South Bay, the hands-down best place IMO is Pinnacles National Park. It's only 1.5 hours from San Jose, and easily daytrippable.
If you don't want to go that far, try anywhere along the Airline Highway, in the Paicines or Tres Pinos area (just get away from streetlights; for example, Panoche Road is a very, very dark road), Coyote Lake (shoreline is open for stargazing 24 hours; pay with machine at entrance), Henry Coe State Park, or anywhere along Mines Road but at least 15km southeast of Livermore.
Also, if you're going for Milky Way viewing, do make sure you know when and where the Milky Way is visible. The bright part and galactic core are only visible very late at night now, after 11pm or so, in the east direction. In mid-Summer the MW will be in the sky all night. In autumn the MW will be in the southwestern skies early at night and not visible late at night.
At other times, such as in winter, the outer parts of the Milky Way are in the sky, but you need much, much darker skies to make anything of it, and it's hard to see without long exposure photography. The winter side of the galaxy is actually really beautiful if you do a long enough exposure and all the signal processing necessary to get rid of noise.
I've also seen the milky way in West Virginia.
From https://www.ucolick.org/main/visit/info.html
"Please do not visit the observatory at night without a ticket to one of our evening programs.
Lick Observatory is an active research facility, and at night all of the buildings are locked and astronomers are working at the darkened telescopes. Telescopes require the darkest possible conditions to detect the faint light from celestial objects. The success of our work relies upon minimizing lights around the observatory at night. Thank you."
It's so performant, and the zooming-as-you-scroll part is really elegant.
If that's your site, which it seems to be - great job!
Do you do any astrophotography?
I don't do astrophotography, my interests are more terrestrial, namely street photography :D
There are lots of street photographers I follow, such as Shin Noguchi [0]. But I absolutely hate how Instagram is the go-to platform for photographers nowadays. I can't imagine a worse viewing experience for street photography, which tends to be ~35mm and landscape, than my phone's narrow, vertical screen. It's awful. But it's the most popular platform today, so there's really no getting around it.
[0] https://shinnoguchiphotography.com/photo/something_here/
Especially essential is planning for dark skies in the direction of whatever it is you are trying to shoot, which is in some cases arguably slightly more important than the dark sky level of where you are standing. If a galaxy rises over a city, it's going to be hard to image even if you're far from the city.
One of the tools I use the most is an app called "PlanIt Pro", which gives you pretty much all the info you need, including being able to show where in the sky various astronomical objects are, their magnitude, a VR simulation of them with the 3D topo map, and lots of other things. It also has a light pollution map built-in, and can show you the position of the Milky Way. I plan many of my shots with it. There's a free version and I can't remember which features are omitted from that but it's been worth every penny for me.
Its - brilliant. Well done and thank you
But .. oh man .. the whole of the UK is polluted :-( maybe a few bits of one Scottish Loch are free.
From 40N latitude one can see the sky as far south as -50deg declination (50 degrees south of the celestial equator). It's true that the galactic center is in the southern sky, but it's still visible from the northern hemisphere. If you can see Sagittarius (the teapot), you're looking in the direction of the galactic center.
The GP's shot is representative of what one can expect from about 40N. From the southern hemisphere, I've seen shots of the milky way that span from horizon to horizon, so I do think they have the better vantage point.
For example, upstate New York has some great viewing locations, so even if you live in NYC it's an easy weekend trip. Here's a shot I took of the Milky Way taken from such a site (one of the darker spots in the map): https://www.lumathon.com/photo/_qTYviEhy/Colors-of-the-Milky...
Edit: a few more of my other shots of the night sky for anyone interested, various locations, all of which were scouted using a light pollution map like the one posted -- https://www.lumathon.com/dan/photos/tag/stars