There are several large petroglyph sites in the area, about 600 panels, and of an amazing variety. We have been lucky to observe several archaeologists at work when visiting and learnt that the red colour has to be refreshed every seventh to tenth year, depending on the water exposure.
See next shot for clearer images:
They had many boats, animals - deer/elk as well as dogs -, were performing rituals, hunting and whatever. The guy in the front andcentre has a bow. And yes, they all have huge penises, and secretly observing other visitors discovering these can be very funny! *lol*
On this slate, a couple of archaeologists were taking measurements and other info. We couldn't find out why the glyphs where painted white here and assume it was for photographing reasons, as the contrast is much better and one sees teh fine details much easier. The original colour was red, though, therefore they get repainted in red.