Old Idaho Penitentiary State Historic Site | Boise

Information

Landmark: Old Idaho Penitentiary State Historic Site
City: Boise
Country: USA Idaho
Continent: North America

Old Idaho Penitentiary State Historic Site, Boise, USA Idaho, North America

The Old Idaho Penitentiary State Historic Site is a former correctional facility located in Boise, Idaho, USA.

This site served as Idaho's primary territorial and state prison from 1872 to 1973.

Visual Characteristics

The primary structures are constructed from locally quarried sandstone, exhibiting a rough-hewn texture and a muted brown-grey color palette. The main cell house, a multi-story building, features a Gothic Revival architectural style with pointed arch windows and crenellated parapets. Other buildings, such as the administration block and workshops, are simpler in design, often constructed from brick and stone. The site covers approximately 47 acres.

Location & Access Logistics

The Old Idaho Penitentiary is situated at 2445 Old Penitentiary Road, Boise, Idaho. It is approximately 3 miles east of downtown Boise. Access is via Old Penitentiary Road, which connects to Warm Springs Avenue. Ample paved parking is available on-site. Public transport options include Boise's ValleyRide bus system; Route 15 stops within a 0.5-mile walk of the entrance.

Historical & Ecological Origin

Construction began in 1870, with the first prisoners arriving in 1872. The site was designed to house inmates from the Idaho Territory, later becoming the state prison. Its original purpose was incarceration and labor for convicted individuals. The land itself is part of the Boise foothills, characterized by arid shrubland and geological formations typical of the Intermountain West.

Key Highlights & Activities

Visitors can explore the historic cell blocks, including solitary confinement areas and the death row section. Self-guided tours are available, detailing the prison's history and inmate life. The site also features exhibits on prison industries, escape attempts, and the lives of guards and wardens. Specific areas include the original guard tower and the former gymnasium.

Infrastructure & Amenities

Restrooms are available in the main visitor center. Limited shaded areas are present within the exhibit spaces and along some outdoor pathways. Cell phone signal (4G/5G) is generally available throughout the site. No on-site food vendors are present, but concessions are available in downtown Boise, a short drive away.

Best Time to Visit

For optimal lighting for photography of the sandstone structures, early morning or late afternoon is recommended. The best months for visiting are typically May through October, offering mild weather. The site is open year-round, but outdoor exploration is more comfortable during warmer periods.

Facts & Legends

A notable historical oddity is the prison's use of inmate labor for constructing many of its own buildings, including the stone walls and cell blocks. Local legend speaks of the ghost of a former inmate named "Old Sparky," said to haunt the gallows area, though this is unsubstantiated.