We are located at

2455 Old Penitentiary Road

Boise, ID 83712 (Next to the Old Pen)

Current Hours

We hope to have Special Events this winter. Click "CALENDAR" below to see any upcoming events. Regular hours will resume in Spring 2022. Check this website for updates.

Free Admission!

Tours and other programs available.

Terry Panhorst

Terry is a retired professor of geology from the University of Mississippi and has become active at IMMG in taking Gift Shop shifts, helping Eliza with the geology of the hillside hikes, giving lectures and helping Steve with field trip planning and leading.