HauntBound · Most Haunted California · Overnight Investigations

Overnight Investigations in California

Ranked from the documented sites in the California index: 10 sites offering a bookable overnight paranormal investigation. Updated September 2026.

  1. USS Hornet (CV-12)
    1. USS Hornet (CV-12) Alameda · Museum / Historical Site · Family Comfort: Moderate

    Grants overnight or private investigation access (up to 12 hours). HauntBound identified 13 distinct published accounts at this museum site, across four kinds of published source. Two later publications retell those accounts. Reported phenomena include apparitions and cold spots.

  2. Preston Castle
    2. Preston Castle Ione · Prison / Reformatory · Family Comfort: Moderate

    Grants overnight or private investigation access (up to 6 hours). HauntBound identified one distinct published account at this former prison. Four later publications retell those accounts. Reported phenomena include apparitions and cold spots.

    Out of season until April· April 1 to Aug 31· verified September 2026Seasonal: April 1 to Aug 31
  3. Kennedy Gold Mine
    3. Kennedy Gold Mine Jackson · Museum / Historical Site · Family Comfort: Moderate

    Grants overnight or private investigation access (up to 6 hours). Three independent sources document this museum site, with a history reaching back to 1860, and an independent publication covers its reports. Reported phenomena include electrical anomalies and phantom sounds.

    Year-round· verified September 2026 Book this investigation
  4. San Fernando Pioneer Memorial Cemetery
    4. San Fernando Pioneer Memorial Cemetery Sylmar · Cemetery / Burial Ground · Family Comfort: Moderate

    Grants overnight or private investigation access (up to 4 hours). Three independent sources document this burial ground, with a history reaching back to 1874. Reported phenomena include cold spots and phantom footsteps.

    Check for dates Check availability
  5. Bard Mansion
    5. Bard Mansion Port Hueneme · Haunted House / Historic Home · Family Comfort: Moderate

    Grants overnight or private investigation access (up to 8 hours). Two independent sources document this historic home, with a history reaching back to 1912, and an independent publication covers its reports. Reported phenomena include apparitions and disembodied voices.

  6. Junipero Serra Museum / Presidio Park
    6. Junipero Serra Museum / Presidio Park San Diego · Museum / Historical Site · Family Comfort: Moderate

    Grants overnight or private investigation access (up to 6 hours). Three independent sources document this museum site, with a history reaching back to 1929. Reported phenomena include apparitions and cold spots.

    Not currently scheduled· verified September 2026 Check availability
  7. Claremont Hotel Club and Spa
    7. Claremont Hotel Club and Spa Berkeley · Haunted Hotel / Inn · Family Comfort: Moderate

    Grants overnight or private investigation access (up to 8 hours). Three independent sources document this working hotel, with a history reaching back to 1915. Reported phenomena include apparitions and cold spots.

    Year-round· verified September 2026 Book this investigation
  8. Winchester Mystery House
    8. Winchester Mystery House San Jose · Haunted House / Historic Home · Family Comfort: Moderate

    Runs hosted after-hours investigations inside the building (up to 3 hours). Seven independent sources document this historic home, with a history reaching back to 1886, and three independent books, broadcasts, or markers cover its reports. Reported phenomena include apparitions and cold spots.

    Check for dates· verified September 2026 Check availability
  9. Star of India (Maritime Museum of San Diego)
    9. Star of India (Maritime Museum of San Diego) San Diego · Museum / Historical Site · Family Comfort: High

    Runs hosted after-hours investigations inside the building (up to 1 hours). HauntBound identified four distinct published accounts at this museum site, across five kinds of published source. Five later publications retell those accounts. Reported phenomena include cold spots and phantom footsteps.

    Check for dates· verified September 2026 Check availability
  10. Whaley House
    10. Whaley House San Diego · Haunted House / Historic Home · Family Comfort: Moderate

    Runs hosted after-hours investigations inside the building (up to 3 hours). HauntBound identified six distinct published accounts at this historic home, across four kinds of published source. Eight later publications retell those accounts. Reported phenomena include apparitions and cold spots.

    Year-round· verified September 2026 Book this investigation