Where are the big amusement parks in the NW
Besides Silverwood, there seems to be a dearth of amusement parks in the I-5 corridor in the NW. Wild Waves isn't much bigger than a state fair midway and Oaks in PDX is ancient.
Any clue why the big companies: Great America, Six Flags has overlooked this area?
I just watched a show on the travel channel about the all the parks in the US and thought of this question.