HauntBound archive · catalog record
Reported phenomena — as catalogued
The on-grounds cemetery of Idaho's first state asylum (1886) — built beside a facility that survived a deadly 1889 fire and still maintains underground tunnels from the early 1900s.
700 E Airport Rd, Blackfoot, ID 83221
Research updated June 2026
Age
All Ages
Cost
Free
Active state psychiatric facility. Campus access is restricted. Drive-by exterior and publicly accessible areas only.
Access
Limited Access
Active hospital campus with restricted access.
Equipment
Photos OK
Est. 1886 · Idaho's first state psychiatric institution, opened 1886 · 1889 fire killed at least two patients; up to seven others unaccounted for · Underground tunnel system constructed in the early 1900s · On-grounds patient cemetery used through the mid-twentieth century · Active state psychiatric facility — Idaho Department of Health and Welfare
Idaho's first state psychiatric institution opened in 1886 in Blackfoot as the Idaho State Insane Asylum. The facility was established to serve the territory's growing population after Idaho achieved territorial status in 1863, with statehood following in 1890.
In 1889, just three years after opening, a fire swept through a portion of the facility. The East Idaho News documented the fire's toll: at least two patients died, and up to seven patients were reported missing and unaccounted for afterward. The 1889 fire is the most significant early event in the facility's documented history.
In the early 1900s, the campus was expanded and a network of underground tunnels was constructed to connect the institutional buildings — a standard feature of large early-twentieth-century state facilities in the region, designed to allow movement of patients and supplies in Idaho's harsh winters. An on-grounds cemetery was established for patients who died at the institution; burials continued through the mid-twentieth century.
The institution has operated under various names over its history and is currently Idaho State Hospital South, an active state psychiatric facility under the Idaho Department of Health and Welfare. The 2026 East Idaho News feature on the facility's history confirms the 1886 opening, the 1889 fire, and the tunnel system as documented features of the campus.
Sources
Idaho State Hospital South has accumulated a ghost reputation that the East Idaho News examined in a 2026 feature headlined 'Fact or Folklore: Is State Hospital South Haunted?' — a piece that documented local paranormal claims against the facility's historical record.
The reported phenomena are specific and recurring: rocking chairs moving without being touched, toys rolling on their own (attributed in local lore to the spirits of children or young patients), and sounds described as eerie noises near the patient cemetery at night. The Idaho Haunted Houses site, which compiles local dark-tourism data, documents the cemetery specifically as the focus of paranormal activity reports.
The Broncwriter student newspaper piece on the facility's history provides the institutional context: the 1886 opening, the campus's development, and the tunnel system built in the early 1900s. The 1889 fire — which killed at least two patients and left up to seven missing — is frequently cited in the lore as the seed event, with the unaccounted-for patients framed in local tradition as still present on the grounds.
Because the hospital remains active, the cemetery and campus are not accessible to outside visitors for investigation. The paranormal accounts are drawn from local tradition and dark-history coverage rather than verified firsthand documentation.
The Idaho State Hospital South campus includes a patient cemetery and tunnels built in the early 1900s. The campus is an active state psychiatric facility; visitors may view exteriors from public roads only.
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