Join Date: Aug 2006
Location: Central Coast, CA
Bikes: Surly LHT, Specialized Rockhopper, Nashbar Touring (old), Specialized Stumpjumper (older), Nishiki Tourer (model unknown)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I agree with BengeBoy. I think you'd be okay in May on just about any pass, but traditionally the North Cascades Highway is one of the last to open. It should be open by May, but who knows. I rode over it in late June. There was plenty of snow on the ground, but the campgrounds were open and the weather was fine (though I got rained on on the west side - big surprise!)
Steven's Pass is beautiful, very ridable, and open all year. I've only driven on Snoqualmie Pass on I-90, which is a major freeway all the way to Boston. But there's the John Wayne Trail on Snoqualmie Pass, which might make it worth a try. Others probably have more information on that route.
It could snow in May, but it's unlikely. It could rain for weeks, which is unlikely, but much more likely than snow; it's not all that unusual up there. It could be beautiful. I remember lots of beautiful, warm springs when I lived up there (the first 35 years of my life.)
Which route are you thinking about?