Probably some cold-tolerant breedsWaynesville out west! Curious what breeds if f egg layers will do well here? im not very high in the mountains only about 2800ft or so.
I personally really like Orpingtons they're very cold hardy and wonderful layers, they are also very friendly.

My flock used to have Buff Orpingtons, Jubilee Orpingtons, (they're expensive and very rare so dont let your money go to waste on them @_@) and Lavender Orpingtons. Right now though, my flock consists of Silver Laced Orpingtons, and Isabel Orpingtons. (They're both also rare and expensive so xD)
Other then Orpingtons I dont really know that much about other breeds :v