
Originally Posted by
woodway
If you are going to be in Desert Aire, an alternative would be to come back over the Vernita Bridge and take WA24 over to Yakima (56 miles according to Google), and then take WA 821 through the Yakima River Canyon to Ellensburg. The ride through the Canyon is pretty nice (but can also get windy). Plenty of places to camp in the Canyon.
This route has light traffic until you get close to Yakima, decent shoulders, but no shade! There are a couple places along the way where you should be able to get water.
You can pick up the Iron Horse Trail in Ellensburg and take it all the way to the Snoqualmie tunnel and down the other side (it's a decent ride), watch for the detours as called out in my last post. In fact on the west side, you be on trail most of the way into Seattle, with just a few road spots thrown in.
The big problem on the I90 crossing is wind. Not just for your riding, but for the big rigs keeping their rigs in the lane.