I've bought a few pallet loads of hardwood from these guys:
I am in CT so shipping from Buffalo, NY wasn't bad at all, so I can't be
sure it'll cost you to get it to Denver, but their prices are pretty good so
it might be work a try.
They shipped the items promptly and they were packaged very well. All of
the stuff I got was in the rough, but it was fairly good quality, with a few
boards having more knots, etc. than I would like. Probably the same would
happen no matter where you get it.
There are no stupid questions.
There are a LOT of inquisitive idiots.
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