For those of you who tie up your own jigs you should give them a shot on the Sandy, Clackamas or Eagle Creek. I personally have not targeted coho as much as many of you here, but the times I have been out they have produced. Last fall when out fishing for early winter steelhead I landed 6 coho with micro jigs while my brother in law landed 3 using roe the whole time. This has been the case everytime out for coho and I don't think its a coincidence. I like using smaller jigs #6 or #8 in purple or purple-black combo's. Osmosis had luck with black-red but I have not tried that color combo personally. Here is a pic of a nice coho with a purple color jig.
And one cool action shot on Eagle Creek.
Just something to add to your arsenal for these finicky fish!