There is a group in Central Minnesota that has group rides every week. Tuesday's are Road Rides in the St. Cloud area. Wednesday's are MTB rides mainly in Elk River, Monticello, Milaca and occasionaly St. Cloud. Thursday's they have Road Time Trials in St. Cloud.
It's a GREAT group. Although I will have to admit there aren't always that many women. But I'd LOVE to see that change!!
Here is the website http://www.porkchopracing.org
Enjoy!