Police were called to Ravensbourne Park today (December 20) at 6.07am to reports of an assault.
At the scene, the 27-year-old was treated before she was taken to hospital with a head injury.
Her condition is unknown at this time.
According to the Metropolitan Police, she had her phone and cash taken from her before the assault.
No arrests have been made but enquiries continue.
The road near Catford station was closed off for nearly six hours today, it is understood.
A Met Police spokesperson said: “At around 06:07hrs on Saturday, 20 December, police received reports a woman had been assaulted in Ravensbourne Park, Lewisham.
“Officers attended alongside the London Ambulance Service, who treated a 27-year-old woman at the scene for an injury to her head.
“She was taken to hospital where her injuries continue to be assessed.
“It is understood the victim was assaulted before having her mobile phone and cash stolen.
“No arrests have been made at this stage and enquiries are ongoing.”
Anyone with information in relation to this incident is asked to contact police on 101, quoting CAD1564/20DEC25.

