Trimming a horses mane is a personal preference Some disciplines require that the mane be worn in a certain style, rolled, or braided, or banded. In the latter 2 having a short mane makes this much easier to accomplish and manes are usually pulled to a short length. Other breeds are shown with long flowing manes and some have exaggerated bridle paths. Bottom line, if not showing, is it is all a matter of personal choice.
When you clip or shave the section of mane behind the horses ear, it is called the bridle path. It is on www.Howrse.com riding level 2.
a Halter
Bridle Path
Bridlepath
Bridle Path
Bridlepath
Bridlepath
Bridle Path
A Bridal Path.
Bridlepath
The bridle path
Bridlepath.