Afaik, all the autocrosses in the region are in the Denver and Colorado Springs area- several WY folks make the trip to events
http://rmsolo.org/ covers both the Rocky Mountain and Continental Divide region events. Come out and have fun with us!
From a social standpoint, there are several regular northern Colorado gatherings, which you'll find in the RMSOLO forums- a very friendly, active, helpful forum.
Next event is a two day school and autox event at PPIR on June 26th/27th, you could make a weekend of it.