The Clack and Sandy have been using different breeding stock than they used to, so the bulk of the runs show up a little later than they traditionally have, which is a little later than the coastal streams. There usually isn't strong numbers until after New Years... but there's typically some that are early, and some that show late. January through March are usually the best months. Coastal streams usually start getting a few around Thanksgiving.
Keep in mind, these are generalizations, and every year is a little different.