North Yorkshire Police say that it happened in Cropton near Pickering on Saturday, April 20
At about 3pm, three men were riding mountain bikes near Cropton Forest when a confrontation took place.
The victim, local resident Alan Cummings, was punched to the head and face by one of the men.
A police spokesman said: "The man who assaulted the victim is described as white, aged in his late 40s or 50, about 5ft 6ins tall, of muscular build with broad shoulders, with a bit of a ginger beard, and possibly tattoos. He was wearing bright-coloured designer mountain bike gear and was riding a yellow bike.
Read next:
- Urgent appeal for missing York teenager
- Historic York church up for sale
- Popular York park set to host much-loved event
YOU’LL FIND MORE ON THIS STORY AND OTHERS AT www.yorkpress.co.uk OR PICK UP YOUR COPY OF THE NEWSPAPER ITSELF AVAILABLE SIX DAYS A WEEK AT YOUR LOCAL NEWSAGENT