Haven't been to Nevada in more than a decade, though I was born in Carson City. Not too much I can say there.
@Colorado Lives in the Denver area, and is much more experienced than I am, so he might chime in.
I'm way down south where the Front Range ends, and depending on what you're looking for you either want to be here in the next few weeks, or April. We have our last frosts as late as May. Often right now is the time, and you would've missed your window, but it's been a decent winter so we've kept everything fast asleep for you.
As an aside, it seems our pinions (pinus edulis) are becoming more popular. I've killed ALLOT of these. The geology essentially requires they be bare rooted at transplant in many scenarios. My best luck with them has been collecting in autumn just before the first hard frost. My theory so far is they hit dormancy before the root damage can kill them outright, and have opportunity to repair some over the winter.