Complete GH location list
 

I think this pretty much covers most of them, even includes private locations.
Dont know how exact they are in some areas but they have the ones nearby me so i assume they are correct elsewhere.

Gloryholelist.com

WOW, thanks for posting that!

Then there are all the private ones like mine, and apparently there are about 3-4 other private ones within a mile of me, because i've had a lot of people say they've been to my place before, and the addresses were all around me, but not mine. :p

That site is awful.
 

It doesn't keep you user info and you cannot post on there.

My go-to site is squirt.org. You can search all the cruising areas, including bathrooms, truckstops, parks, arcades, theaters etc in your area or where you are traveling to. The mobile version isn't as user friendly because you can only view those near your location. I usually use the mobile version when traveling to see who and what is near me. You can leave reviews of locations or post that you will be there on X day at Y time and what you are looking for. Of course, paying members get more access and messaging.