Did a bit of research on this question. The pinks are a two year cycle fish, spend the least time in fresh water after hatching, are the most abundant of all salmon species, migrate the least distance into the ocean of all salmon ( about 250 miles from river estuary) and are found throughout the west coast as well as the Asian coast, Russia,China Japan etc, and in the Great Lakes.
Most south coast rivers have pinks on the odd number year, i.e. 2003, 2005, but as said in another post can have an even year run, i.e. Squamish.
Central coast rivers have both odd and even year runs but each run is genetically different from each other and usually one is more dominant than the other. They are also the smallest of the salmon and average between 3 to 5 lbs. I think the largest ever caught was weighed in at about 21 lbs. They are called humpback or "humpies" because of the hump that develops on the male as they enter fresh water. They usually spawn in rivers with no lake as headwaters..