In the summer you can drive through packwood from Portland and go over the pass to Mt. Rainier & Crystal Mt. In the Winter the pass is closed so you need to go through Enumclaw. Take I-5 North.
Take the WA-512 EAST exit, exit number 127, towards PUYALLUP/MT. RAINIER.
Merge onto WA-512 E.
Take the WA-167 NORTH exit towards SEATTLE(WA-410 E)/YAKIMA.
Merge onto WA-167 N.
Take the WA-410 EAST exit towards SUMNER/YAKIMA.
Merge onto WA-410 E.
Turn LEFT onto CRYSTAL MT BLVD.