I would like to suggest Grand Junction, Colorado. Located on the mild side of the Continental Divide. Easy access via Interstate 70. Between Denver and the Utah border designated the most scenic Interstate in the U.S. Easy access from Canada and all other points of the U.S.
In the heart of some of the best riding in the U.S. Biker friendly town, great accommodations, large selection of eating establishments, & scenery galore.
Close to the Colorado National Monument, Grand Mesa and highway 65 scenic byway (10,000 ft elevation). The scenic byway to Gateway, CO [ame=http://www.youtube.com/watch?v=WvipmB-v2YU]YouTube - Riding Unaweep-Tabeguache Byway[/ame]
and a NEW auto museum http://gatewaycanyons.com .
Location of many great wineries with curvy roads through the orchards of Peaches, Apricots, Grapes, Cherries, & more.
Not that far from the Million Dollar Highway, & the Black Canyon of the Gunnison.
Motorcycle mini tours already set up: http://fruita-co.home.bresnan.net
Location of successful motorcycle rallies in the past (Sierracade 2000, GWTA 2005).
The Grand Junction Visitors Center knows how to get a Rally set up and has volunteers to help. http://www.grand-junction.net/
Be sure to view all the web pages above!