Boise to Seattle ???

[SWNimz]

I am thinking about a cruise from Tiburon to Boise to Seattle on 80 to Winnemucca, 95 to Meridan/Boise, 84 to Hermiston, 82 to Ellensburg, and then 90 to Seattle, and back south on 101 to Tiburon.  Anyone have any suggestions, Warning?  Have a 40' diesel pusher with no toad.  It does not appear to be to much in mountain driving but never having done this route am not sure. 

Would you cut off Seattle and take the 84 to Portland and then down or is it worth it to take the extra time and miles to go up to Seattle on the 90?

Thanks in advance for your suggestions and thoughts.

 

[SWNimz]

Forgot to add that this trip would be late summer early fall. 

 

[donn]

Unless you have something specific to see or do I would skip Seattle head due west from Portland and start your trip down the coast at Ft Stevens state park.

 

[skyking1]

If you've never been across sr410, Chinook Pass, I would recommend it highly. I-90 is boring.

 

[SWNimz]

Are there any steep grades that I should be aware of?

 

[donn]

I84  Between LaGrande and Pendleton Cabbage hill just before  Pendleton, I90 back side of the Cascades heading toward Seattle.