BNSF Intermodal route from Seattle to Spokane would go thru Everett or Vancouver WA?

I am planning some train chasing this summer across WA state so how would my train be routed?

Generaly intermodial takes the old GN line. Seattle-Wenachee-Spokane (Stevens pass)
manifest traffic and a couple intermodials to/from Vancouver take the SP&S route along the river.(Seattle-Vancouver-Pasco)
There is also traffic on the NP route now (Tacoma-Yakima-Pasco) over Stampede pass.

This could get confusing if someone is trying to put together a railfan guide to that corridor.