Helm's Deep was a large valley in the north-western Ered Nimrais (White Mountains) below the Thrihyrne.
- Helm's Deep has multiple presentations -- "Before Midnight," "After Midnight," "Before Dawn," and "Sunrise". While these four presentations are visually identical, the game mechanics require that they each have unique "maps" (coordinates) to locate objects and individuals.
- One begins the Epic Battles portion of Vol. III. Book 13, Chapter 3, Night Depens, by clicking on the map table -- "After Midnight" to time shift and begin the Epic Quest sequences. To return to the normal game world, click on the Grain Sacks - "Helm's Deep, before Midnight."
- Map: EB-Helm's Deep
- Before Dawn: The "tipped barrel" will allow time to pass to begin Vol. III. Book 13, Chapter 7, Defending the Deep
- There are no services available at Dawn.
- (There is no map for the Glittering Caves inside the entrance - 71.3S|142.2W.)
- Sunrise: one interacts with the "leaning banner" to time shift for Vol. III. Book 13, Chapter 10, The Hornburg
- Only "Before Midnight" can the following services can be found within the settlement of Helm's Deep:
- Gléowine and his Map-table (Helm's Deep, ater Midnight) exist to transport you into the Battles.
- Hunter Trainer
- Rune-keeper Trainer
- Lore-master Trainer
- Minstrel Trainer
- Burglar Trainer
- Guardian Trainer
- Captain Trainer
- Warden Trainer
- Champion Trainer
- "Turbine said that while Peter Jackson's vision of Helm's Deep made a serious impact on how fans saw the battle, "LotRO is the game of the books" and as such is striving to provide a more accurate representation of the conflict. So while there will be no Elves showing up or Gandalf charging in to save the day, we will experience many events of the books that didn't make it to film, such as clashes at the dike and the glittering caves.
- "The outcome of the "Big Battle" of Helm's Deep is fixed in lore and won't be impacted by the player, but each player can make a difference in how they contribute to that victory through their efforts.
- "Part of a player's contribution will depend on how his group coordinates (if he is in one) and what role he decides to pursue. There are three roles in the defense of Helm's Deep: vanguard, engineer, and officer. Vanguards are focused on wading into the battle and doing some personal damage, engineers fire siege weapons and interact with environmental objects, and officers give orders. Seems there's a little something there for all interests." 
- Tolkien Gateway - Helm's Deep
- The determined defense of Lord of the Rings Online: Helm's Deep - A press preview.
|Settlements and Landmarks of Westfold|
|Settlements:||Helm's Deep • Grimslade|
|Landmarks:||Erkenbrand's Refuge • Fords of Isen • Fushum Raus • The Hornburg • Lufût-mos • Marton • Marton Farmlands • Marton’s Refugees • Shatorthum|
|Settlements, Areas and Landmarks of West Rohan|
|Settlements:||Aldburg • Beaconwatch • Brockbridge • Edoras • Entwade • Fenmarch • Gapholt • Grimslade • Helm's Deep • Middlemead • Oserley • Stoke • Tordag's Camp • Underharrow • Woodhurst • Derndingle|
|Areas:||Broadacres • Eastfold • Kingstead • Stonedeans • Westfold • Entwood|
|Landmarks:|| Kingstead: Dark Door • Dimholt • Dunharrow • Bosa's Farm • Folcbur’s Homestead • Gurz-shâpol • Harrowdale • Meduseld • Pendlac’s Farm • Upbourn|
Eastfold: Everholt • Folde Farm • Gris-shâtroful • Dorr-shâtroful