Authorities are seeking the public’s help in identifying a man who sexually assaulted a woman on the Billy Goat Trail in April in Great Falls, Md.

About 1 p.m. on April 27, a woman was jogging on the trail when she was approached by a man who asked her a question, the U.S. Park Police said in a statement. When she stopped to respond, the man grabbed her and began assaulting her before fleeing when several hikers approached the area, the statement said.

The man was described as white, in his mid- to late 20s, 5 feet 11 inches to 6 feet tall, with a medium build, short brown hair and unshaven appearance, according to the statement. He was wearing a gray sweatshirt and black athletic pants with a white stripe down the sides, police said.

U.S. Park Police, who only recently learned of the incident, asked anyone with information about it to contact them at 202-610-7505, or the call their tip line at 202-610-8737.