So, just south of Ticonderoga is a raider enclave. It's got a couple of entrances but there is a high rise to one side and some connected buildings across the square. There is a raider popping at me from atop the high rise, but I can't find an entrance anywhere. One side of the building is up against the river. Any suggestions?
I think I know the area you're talking about, and there should be a button that summons a cable car on the roof opposite the highrise. It's a big red button on a post. If that doesn't work, you could post a picture of where you are, and I'll go find it, then fly around the place with console commands and see if it's accessible.