The incident took place in Dutchess County around 6:30 p.m., Tuesday, July 18 in the city of Beacon.
According to Det. Sgt. Jason Johnson, of the Beacon Police, the unidentified Beacon resident, was last seen falling into Fishkill Creek in the area of 50 Leonard St.
An immediate search of the creek by police and fire led to the discovery of the woman by the City of Beacon Fire Department personnel.
The victim was unconscious and unresponsive. Lifesaving efforts were initiated and she was transported to a local hospital where she died from her injuries, Johnson said.
An investigation confirmed the initial report that the woman accidentally fell backward while having her picture taken, he added.
Police have not released her identity pending notification to extended family.
"The City of Beacon offers its condolences to the family and friends of the deceased," Johnson said.
This is a developing story. Check back to Daily Voice for updates.
Click here to follow Daily Voice Middletown-Wallkill and receive free news updates.