There is the upcoming overnighter ride called the Wyoming Wander. Mini5280 and MiniCOW is taking part. 14th will be a run from Denver to Cheyenne, and the 15th will be a run from Cheyenne to Denver. With a dinner, group photo, and a tour of F.E. Warren AFB as part of the festivities.
See the following for more details:
http://www.northamericanmotoring.com/forums/mini5280/256624-wyoming-wander-14-15-sep.html
https://www.facebook.com/groups/161914287333225
https://www.facebook.com/MINI5280