for the Terrace ara rivers , 30lb is the most common leader strenght to use. Not wanting to stir it up but there are very few rivers in the northern half of the province that you would even think about using anything less. They are just not like fishing anything in regions 1 or 2 for summer/fall chinook. The rivers are bigger, quicker, lots of time little if any room to chase a fish. On rivers like the Atnarko or Kalum, you would land very few if any at all fishing anything less than 20lb so 30 becomes the norm. Standard Atnarko gear is 40 main and 30 leader or 30 straight through which causes problems when guys break off leaving way too much line in the river. When the river is up guys switch to 50 or 60 main and 40 or 50 leader.