This mountain was named in 1960 in honour of F/O Leonard D. Dingley from Cranbrook, BC. He was killed on 12 November 1943 when his Halifax Bomber was lost on a mine laying operation.

Frank Morro (Mount Morro), Jim “Moose” Haley (Mount Haley), Stewart Flett (Flett Peak), and Len Dingley were members of a Cranbrook based Rover group that explored the mountains of the area together prior to joining the Royal Canadian Air Force during the Second World War. All four were killed in action while serving with Bomber Command. These mountains were named in their honour.