A man indecently exposed to a 33-year-old jogger on High Street East, near Glossop Leisure Centre, on Sunday at about 8.30am.
The man is white, 5ft 6-8in tall and of medium build. He is in his late twenties with short dark hair and had a white mountain bike with him. He wore black tracksuit bottoms, a black zip-up jacket and white trainers.
Anyone with information should call police on 101.