Shad are here! In the past week my friend and I have caught over 500 shad at Cascade Locks, and around hooked around 15 salmon but landed only 6, none were kept. Chartruse yarn is the key! To fish at Cascade Locks, you need a rig like this: 4oz Cannon ball, 12" up a Treble Hook with Yarn, and 12" above that another and another. Fish have been in the top zone, about 6 feet under the surface. Casting as close to the wall as possible has been key!
Good luck out there!