Police have released images of two men they wish to trace after a woman was sexually assaulted on a bridleway.
Officers said it happened on Littlewood Lane near Mansfield Woodhouse, Nottinghamshire, shortly after 15:30 BST on 10 September.
They urged those pictured in the CCTV images to come forward.
The woman, who is in her 20s, reported being inappropriately touched by cyclists.
PC Richard Cutt, from Nottinghamshire Police, said: "This was an upsetting experience for the victim who was on her own at the time.
"This kind of behaviour is absolutely unacceptable."