This thread needs pictures.
The North Cascades Highway is spectacular. Weather is hit and miss in June, but you have a good chance of warm sunshine. And there should still be a lot of snow on the peaks, possibly on the side of the road, too.
It's a highway, not a freeway. Also, it's a fast but not especially well traveled road.
You should be self-sufficient. Bring a water purifier. You can drink untreated creek water in the alpine, but not at the side of the road.
This was Washington Pass on May 5 of this year.
This was early July of last year.
The road typically has good shoulders, here are some from early spring of last year.
This is "the other side," Winthrop, although you'll have more passes to do after this.
Originally Posted by busygizmo
The approach and west side of the passes is one of the wetter areas in the state so I would plan for rain until you cross the second pass. The first pass is called Rainy Pass.
FYI, from a climate and plant life perspective, the Pickett Range is the division between east and west. So near Marblemount or Newhalem.