Thanks for all the info.
I thought my increase was bad. Glad I don't live up north - sounds like you guys are really getting taken.

I was able to file a protest online - link is on the NOV I received.

Of course, the Teller County website that has a tool for showing comperable qualified sales does not work, but I was able to use Zillow.
I found houses that have recently sold, and Zillow has a link on each property to the Assessor's site that provides the legal info needed to complete the online appeal.
They want to know what I believe it is worth, the reason why, and the legal info on three comparable sales. Fairly painless actually.

I received a confirmation email, and now I wait.

Thanks again