I live in the Pacific NW, where I build anything outdoors with treated wood. I am doing an outdoor trellis in the Denver area (Loveland); the climate there is quite arid and am wondering whether treated wood is commonly used over there for that? If I were to use treated, the reddish/brownish tone of the wood would be acceptable as a long term finish color; if using regular lumber, I would probably need to stain it, knowing it'd need restaining every few years due to the harsh sun exposure. I'd like to avoid this type of maintenance.
Any thoughts from folks familiar with that area?