BB - take HWY 18 all the way to I90. Go under the freeway and drive throught the snoqualmie ridge neighgorhood for a few miles until you come to a 'T'.
Take a left at the light.
You immediately pass the main stem river just above the falls.
Then you pass Snoqualmie Lodge\Falls.
You go down a winding road that crosses tokul creek on a hair pin curve. Take the first left after the curve to Hatchery Rd. Where tokul flows into the snoqualmie is a combat fishing zone, but can be productive if the hatchery brats are stacked up. Start exploring upstream or downstream from here...

Or, keep going down the hwy to Fall City and find the confluence with the Raging river. Or take a right before fall city and head to carnation and fish where the tolt river joins it.

But to be honest, you will probably be better off fishing your home water (the green, right) and learning it's holes very well. Or head to the Sky where you have a better chance for the greater number of salmon and steelies....