When I was about 13 or 14 I worked for a guy my dad knew backpacking supplies into an area where he was hoping to set up a jade mine. Being so long ago I can't remember very well the size of the area, but literally every rock was jade. I particularly remember eating lunches on a boulder of jade which sat in the middle of a creek. I was amazed at the color variations - I had previously thought that jade was only green.
Ever since then, I have wanted to find the place again and obtain enough jade to build a fireplace front out of it. I have tried and the effort was not fruitful. All I can remember was that it was on the north side of the North Cascades Highway, then up a logging road for a way, then East off of that. I don't suppose I will ever find it now.