I consider anything 300 yards and over long range. I got to this number bye reading that most people are not capable of taking game that far out. I never really thought it was true until I started bringing many friends to the range. Out of all the hunters and shooters I've brought out to my range very few are able to hit a 18 inch steel plate at 300.
I also think it matters were you are from. Many of these shooters are very accomplished hunters here in Michigan. That being said most of our shots are under 100 yards.