In reply to MartynH:
Hi Martyn,
There will be a total solar eclipse in the late morning of August 21 passing over Oregon around Mt Jefferson, a volcano, not too far from the PCT. What I know of the PCT (I live nearby) is that you might be traveling in that area about that time. If you can arrange it, I think it might be an experience not to be missed.
Traveling through the N Cascades of Washington in September is fantastic. In a good year it is a perfect temperature for walking and the wild berries are plentiful. I look forward to those days when I can stand in a berry patch and eat, and eat, then move to a different berry species and eat more.
When you are finished the PCT in Manning Park, Canada, imagine what awaits to the north, across Highway 3 - much more and much deeper wilderness.