The victim was identified as 21-year-old Kierra Johnson, a student at Hussian School of Art.
Johnson was last seen Thursday and her family reported her missing the following day.
A passerby found her body face-down in the creek near the Spruce Street entrance of the park around 11:26 a.m. Friday and called 911.
Authorities said a motive for the murder is not immediately clear.
Authorities are also working to determine if she was killed in the creek or somewhere else and put there.
"We don't know that yet at this point. It doesn't appear the body was there very long," said Capt. John Ryan.
According to an essay she penned while interning at Mass Parks Student Career Intake Program, she was passionate about the arts and land conservation.
There has been no word on any suspects or arrests in her killing.
The Hussian School of Art released a statement on the loss of Johnson, reading: "Ki, as she was known to all, was a honors student, on the Dean's List and an excellent artist."
Anyone with information is asked to contact police.
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