The U.S. Park Police are looking for a man they say sexually assaulted a woman on the Billy Goat Trail in Great Falls.
The woman was jogging on the trail on April 27, 2016 when a man asked her something, officials said.
When the woman stopped to respond, the man grabbed her and started to assault her, according to park police. He ran away when hikers got closer.
Investigators have released a sketch of a suspect. He is described as being in his mid- to late 20s, about 5' 11" to 6-feet tall with a medium build, short brown hair and unshaven. He was wearing a gray sweatshirt and black athletic pants with a white stripe down the side.
Anyone with information is asked to call park police at 202-610-8737 and reference case #16-067923.