Just past Green River Overlook, Candlestick Tower Overlook is one of THE BEST spots for sunset, and its likely you'll be all by yourself. With similar views to Green River, this one looks directly west and is my favorite for a winter sunset. Parking is limited to 6ish cars, but plenty of space to disperse to watch the sun go down.

You'll see me say online that Green River is my favorite (well, for the masses, it is), but this is my favorite sunset spot that I keep to myself.