On May 5, 1945, Reverend Archie Mitchell took his pregnant wife and five Sunday school children, from the Christian and Missionary Alliance church where he was minister, on a picnic and fishing trip.
 The group found the logging road they followed blocked, so they stopped next to Leonard Creek, eight miles (13 km) east of Bly near Gearhart Mountain.
While Mitchell was unloading the food, he heard one of the children say, "Look what I found!"
 His wife and the children ran to see what had been found.
 Moments later, there was an explosion.
 Mrs. Mitchell and all five children were killed instantly.

The children had found the remains of a Japanese balloon bomb, one of approximately 9,000 balloon bombs launched from Honshū, Japan between November 1944 and April 1945.
 The balloons drifted across the Pacific Ocean to North America via the jet stream in about three days.
 The hydrogen-filled balloons were 33 feet (10 m) in diameter and carried five bombs, four incendiaries and one anti-personnel high explosive.
 It is believed that as many as 1,000 balloons may have reached the United States and Canada.
 However, there were only 285 confirmed sightings on the west coast, and two balloons were later found in Michigan.
 Except for Elsye (aka Elsie) Mitchell and the five children killed near Bly, the bombs caused no injuries.
 These six individuals were the only Americans killed in the United States during World War II as a direct result of an enemy balloon bomb detonation.

In 1976, Sakyo Adachi, a Japanese scientist who helped plan the balloon offense, visited the site and laid a wreath at the monument.
 He later sent a letter of apologies to the Patzke family for the loss of their two children.

In 1995, Japanese students sent 1,000 paper cranes, a Japanese symbol of peace and healing, to the families of the victims.
 Six cherry trees were also delivered to Bly to be planted at the site.
One of the cherry trees was planted just north of the fenced monument site.
The remaining trees were planted inside the fenced area.
Later that year, over 500 people attended the 50th anniversary re-dedication ceremony at the Mitchell Monument site.

The Mitchell Monument site was originally owned by Weyerhaeuser Corporation.
 In 1996, Weyerhaeuser donated land around the monument to the Fremont National Forest (now the Fremont-Winema National Forests).
Additional property was added to the site in 1997.
 A small picnic area was developed around the monument.
On May 5, 1945, Reverend Archie Mitchell took his pregnant wife and five Sunday school children, from the Christian and Missionary Alliance church where he was minister, on a picnic and fishing trip.  The group found the logging road they followed blocked, so they stopped next to Leonard Creek, eight miles (13 km) east of Bly near Gearhart Mountain. While Mitchell was unloading the food, he heard one of the children say, "Look what I found!"  His wife and the children ran to see what had been found.  Moments later, there was an explosion.  Mrs. Mitchell and all five children were killed instantly.
The children had found the remains of a Japanese balloon bomb, one of approximately 9,000 balloon bombs launched from Honshū, Japan between November 1944 and April 1945.  The balloons drifted across the Pacific Ocean to North America via the jet stream in about three days.  The hydrogen-filled balloons were 33 feet (10 m) in diameter and carried five bombs, four incendiaries and one anti-personnel high explosive.  It is believed that as many as 1,000 balloons may have reached the United States and Canada.  However, there were only 285 confirmed sightings on the west coast, and two balloons were later found in Michigan.  Except for Elsye (aka Elsie) Mitchell and the five children killed near Bly, the bombs caused no injuries.  These six individuals were the only Americans killed in the United States during World War II as a direct result of an enemy balloon bomb detonation.
In 1976, Sakyo Adachi, a Japanese scientist who helped plan the balloon offense, visited the site and laid a wreath at the monument.  He later sent a letter of apologies to the Patzke family for the loss of their two children.
In 1995, Japanese students sent 1,000 paper cranes, a Japanese symbol of peace and healing, to the families of the victims.  Six cherry trees were also delivered to Bly to be planted at the site. One of the cherry trees was planted just north of the fenced monument site. The remaining trees were planted inside the fenced area. Later that year, over 500 people attended the 50th anniversary re-dedication ceremony at the Mitchell Monument site.
The Mitchell Monument site was originally owned by Weyerhaeuser Corporation.  In 1996, Weyerhaeuser donated land around the monument to the Fremont National Forest (now the Fremont-Winema National Forests). Additional property was added to the site in 1997.  A small picnic area was developed around the monument.
Mitchell Recreation Area