The easiest way to see and hear the rut is to go on a ranger-led guided walk. Keep an eye on the events calendar (link) to get details. Alternatively one of the easiest places and best chances is down Glen Muick, taking the minor road from Ballater. Big herds can also be found in the uplands of Atholl estate and around the Ladder hills, east of Glenlivet.
If you plan on going looking for deer, please be careful not to disturb any stalking activities.
Find out more at: head for the hills
Embedded video of deer rut and links to info sites