Old Idaho State Penitentiary
Boise, ID
The Old Idaho State Penitentiary, also known as the Old Pen, opened in 1872 as the Idaho Territorial Prison on a site outside Boise. The facility operated for 101 years, holding more than 13,000 inmates including over 200 women and children as young as ten and eleven. The prison closed in 1973 following inmate riots and is now operated as a museum by the Idaho State Historical Society.




