Went back and check my resource again....and apparently the timing of pink runs and run size depend on your location.

From an article by DC Reid.

"On the southern coast, the consequences of breeding true have been evident for 70 years. In the early 1920s, a major landslide at Hell's Gate , a treacherous obstacle on the Fraser River, prevented virtually all pink salmon from migrating to their short spawning streams. Since then, pink salmon have returned in catchable numbers only in odd-numbered years, swinging south around Vancouver Island on their approach from the open Pacific. In mid-island waters, pink return in both even- and odd-numbered years, while on the northern coast of British Columbia, pink return to short coastal streams in even-numbered years."