agesilaus wrote:
Anything before May is asking for snowstorms or worse in high country. I've been snowed on July 3rd at Craters. The North Rim of the GCNP won't even be open then, the South Rim will but may have deep snow. This winter is looking like another very cold and snowy one. Snowfall records have already been broken in Montana and they have had significant snow all the way down into CO and CA. Very early snow.
Last year's snow hasn't even melted in some places which is also unusual. I'd aim further south if the time frame is rigid, lots to do in southern AZ and NM. It's the perfect time to visit Big Bend NP in TX. I would not want to be caught in a blizzard in that class A on a mountain road.
So we're looking at Big Bend and I-10 rather than I-20 and staying further south on the way back east. US 50 through Nevada is probably doable in the early June time frame.
I thought it may have been too early for this trip. I just don't want to get sucked into the hoards trying to cram a vacation into a couple of weeks in Yellowstone.
I crossed the Rockies on I-80 in late June some 40 years ago and remember the gas station attendant comment that the pass I was about to cross was closed the previous week. Do much for global warming.