Folkjam is a great new service where you can list your jams or music festivals. You can join and set up folkjam.org so when you visit, you'll see a map of events in your local area.
Below are listings for our area. If you have additional events to add, click on the logo and submit them at the Folkjam site. They'll end up here too.
You'll note we've used Alma, MI, because it's a good mid-point, to look for items in Michigan and nearby locations.