From Seattle and the Eastside
Take I-90 eastbound to exit  #32 (436th St).
Turn left and take 436th back over I-90, until it dead ends at North Bend Way.
Turn left, then take the first right - Mt. Si Road. 
Stay on Mt Si Road for 3 miles (Look for the Rainbow Lodge sign on your left - exactly 1/4 mile past the Mt Si Trailhead).

Rainbow Lodge Retreat Center

PO Box 963
46820 SE Mt Si  Road
North Bend, WA 98045

425 888-4181  
 rainbowlodge@rainbowlodge.org