Mt. Tamalpais No launch site, this was just a massive radar installation on the middle and west peaks of the mountain. The barracks and housing on the west peak were scheduled for demolition a few years ago, and may be gone now. Mt. Tam gets to the top, there's a big gate on the north side. The battery areas are visible from the road behind a fence. The IFC was at the high point of the island, named Mt. Livermore.
Concrete pads remain.
The IFC was on San Pedro Ridge, north of San Rafel. Concrete pads remain, plus some clearings where the barracks were. The residents don't like you to drive up it, although I believe it's legal. One peculiarity of the system was that it had a minimum range as well as a maximum - if the target was too close to the launcher, within about two miles, it could not be hit. Because of this the installations were sometimes placed in pairs, each able to cover the other's dead zone.