Police said between 8 and 9 p.m. on Sept. 23, the victim was on the walking path south of the intersection of Washington Street and IL Route 21 when the assault occurred. The path runs alongside an apartment complex.
Residents often walk their dogs along the path.
"It's really nice back here. We have all the wooded trails. We have so many people out, and then to think that that would happen is just horrible," said Katie Urban, resident.
"Definitely looking over my shoulder, for sure, and probably not go out after it gets dark, especially walking," said Fiona Clarke, whose apartment is just steps from where the assault occurred.
Police have not released any further details about the incident itself, including how the victim was approached and assaulted.
The suspect is described as a male with a "tan" complexion and medium to heavy build, "but not fat," with short dark hair that was shaved on the sides, and a goatee. The victim said he smelled like smoke and was "sweaty" at the time of the attack. Police released a sketch of the suspect on Thursday.
Police said the suspect was wearing a dark-colored hooded sweatshirt made of lightweight material with a contrasting color logo on the left breast, and dark-colored pants that may have been sweatpants.
Police are working on a composite sketch of the suspect.
"I'm definitely going to be more cautious and really take into consideration what the time is, what the light is," Urban said.
If you have any information about the assault, contact the Gurnee Police Department at 847-599-7000. Anonymous tips can be called into the Lake County Crime Stoppers at 847-662-2222.