Yeah, through April 18th below Bonneville. The bubble fisheries will probably still be open after the 18th.
Such as mouth of:
Cowlitz, Kalama, Lewis, etc.

When they're crossing Bonneville in good numbers, the Wind bubble, which is quite liberal, gets very good.

If you have the gumption, you can chase these guys through June.
You will be in skinnier water or way up the big C, however.