The Fraser River pink salmon run doesn't really start until the end of August. If you look at the test fisheries at Cottonwood from the past four or five pink salmon seasons, you'll see that the first large catch usually occurred around the first few days of September.
Keep an eye on the fishery notices, or just on this website since they'll be posted up right away, for the Fraser River salmon reopening as we get closer to the end of this month. Reopening date will depend on the summer run sockeye run timing. Once resource managers determine that most of the summer run passes the Lower Fraser River, it should reopen.