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Thomas Mylon Gronewold

Case Classification: Endangered Missing / Lost/Injured Missing
Missing Since: August 7, 1966
Location Last Seen: Libby, Lincoln County, Montana
Description:
Gronewold was last seen on the Kootenay River between Troy and Libby, Montana on August 7, 1966. He has never been seen again. At the time of his disappearance, Gronewold was employed for the summer with the National Forestry Service at the ranger station near Troy, Montana. He and a couple of friends from the station were floating down the river in inner tubes when they hit rough water. Gronewold was flipped out of his inner tube and came to the surface twice and then disappeared. His friends were unable to reach him. Despite searches of the area, he was never located.
Investigators:
The National Missing and Unidentified Persons System (NamUs)
Missing Person / NamUs #MP82175

Case Classification: Endangered Missing / Lost/Injured Missing
Missing Since: August 7, 1966
Location Last Seen: Libby, Lincoln County, Montana
Description:
- Date of Birth: circa 1947
- Age: 19 years old
- Race: White/Caucasian
- Gender: Male
- Height: 5 ft 10 in
- Weight: 185 - 198 lbs
- Hair Color: Blond/Strawberry
- Eye Color: Blue
- Nickname/Alias: Unknown
- Distinguishing Marks/Features: End of little finger and ring finger on his left hand are shorter due to a farm accident.
- Clothing & Personal Items: Possibly swim trunks or denim cutoffs
- Identifiers: Unknown
Gronewold was last seen on the Kootenay River between Troy and Libby, Montana on August 7, 1966. He has never been seen again. At the time of his disappearance, Gronewold was employed for the summer with the National Forestry Service at the ranger station near Troy, Montana. He and a couple of friends from the station were floating down the river in inner tubes when they hit rough water. Gronewold was flipped out of his inner tube and came to the surface twice and then disappeared. His friends were unable to reach him. Despite searches of the area, he was never located.
Investigators:
- Lincoln County Sheriffs Office: 406-293-4112
Case Number: 21LC05565
- Montana Missing Persons Clearinghouse: 406-444-2800
The National Missing and Unidentified Persons System (NamUs)
Missing Person / NamUs #MP82175