A woman was robbed and sexually assaulted at gunpoint inside Inwood Hill Park, police said Tuesday.

The 37-year-old victim was walking inside the park near the corner of West 218th Street and Indian Road on Monday just before 6:30 p.m., when the hooded stranger approached her and flashed a black gun, police said.

The man snatched her wallet and gold iPhone SE, then forced her to perform a sex act on him, cops said.

He ran off, heading south on Indian Road.

The woman was taken to NewYork-Presbyterian The Allen Hospital for treatment.

Police provided photos and a video of the attacker, who was wearing a gray sweatshirt, a black and red backpack, and black and red sneakers.

He was last seen on Seaman Avenue and West 214th Street, according to a tweet posted by the NYPD’s 34th Precinct.