Wintergrasp
While not technically a battleground, Wintergrasp hosts a battle every two hours or so during which it behaves exactly like a battleground. The difference is that the Wintergrasp zone is open all the time, and PvP combat is always permitted, even on PvE servers. This means that players can enter the zone and take up positions before the battle begins, and it means that all players remain in the zone (and can still fight and die) after the battle ends.
Map and Basic Abbreviations
This is a zone, rather than a battleground, and so it can entered and exited at will. Each starting area contains a flypoint. In addition, whoever controls the fort can access a teleport to Dalaran.
Each team may have up to 120 players. Teams are organized into raids of forty players each.
(A number of areas dedicated to quests that happen when the battle is not going on have been omitted from this map.)

In the fort …
Special Considerations
The greater the gap in numbers, the more tenacity you get. Tenacity also gives your vehicles a health buff ... but no damage buff.