Rockhound all over central Oregon and Washington found lots of obsidian , hard agate and jaspers. Never found any chert or flint types, although I did trade for some at a rock show and that piece is somewhere in a bucket with lots of other rocks!
jasper makes good gun flints but needs to be heat treated to knap, the knapper before me at The Dixon's Gun Makers fair used local jasper (I wish I knew the source)