Morthond Vale?

Third Age? Yep
Living? No
Onward....is it a person? No
Is it an object? No
First Age? No
Is it south of Isengard? Yes
An event? No
A place? Yes
Founded by Numenoreans? Not directly.
A hill/mountain? No
A body of water? No
Is it in South Gondor? No
Is it in LotR? Yes
Is it Dol Amroth? No
Is it in Lebennin? No
Is it Pelgir? You mean Pelargir? No
Is it west of the River Ringlo? No

Morthond Vale? No

And a change in answers: to the question "Is it west of the River Ringlo?" the answer is No. And see question "Founded by Numenoreans?" above - my answer seems to have been misleading.

east of Anfalas?

Is it in Rohan?

east of Anfalas? Yes
Is it in Rohan? No

Y'know, I'd be really sad to see this thread die. :(

founded by elves?

Is it Anorien?

founded by elves? No
Is it Anorien? No

Is it related to the paths of the Dead?

Is it related to the paths of the Dead? No

Is it a city?

Ach! Arestevana is here!
 

Welcome back!

Is it mentioned in RotK?

Is it mentioned in TTT?

Let me second the welcome back, Arestevana! And Nilp, I've not seen you around much lately either. Nice to see you back, too.

Is it a city? No
Is it mentioned in RotK? Yes
Is it mentioned in TTT? No

west of Pelargir?

west of Pelargir? No

The Druadan Forest?

---
Thank you Nilpaurion, Firefoot. Good to be back. :D

The Druadan Forest? No

South of the White mountains

Henneth Annun?

South of the White mountains? No
Henneth Annun? No

North of the white mountains?

North of the white mountains? No

Thanks, Firefoot!
 

Is it the pass where Nimrodel and company attempted to cross into (later) Dol Amroth?

If not, does it have a name?

Is it in Ithilien?

Is it the pass where Nimrodel and company attempted to cross into (later) Dol Amroth? No
If not, does it have a name? Yes
Is it in Ithilien? No

East of Ephel Duath?

For clarity...
 

Third Age? Yep
Living? No
Onward....is it a person? No
Is it an object? No
First Age? No
Is it south of Isengard? Yes
An event? No
A place? Yes
Founded by Numenoreans? Not directly.
A hill/mountain? No
A body of water? No
Is it in South Gondor? No
Is it in LotR? Yes
Is it Dol Amroth? No
Is it in Lebennin? No
Is it Pelgir? You mean Pelargir? No
Is it west of the River Ringlo? No
Morthond Vale? No
east of Anfalas? Yes
Is it in Rohan? No
founded by elves? No
Is it Anorien? No
Is it related to the paths of the Dead? No
Is it a city? No
Is it mentioned in RotK? Yes
Is it mentioned in TTT? No
west of Pelargir? No
The Druadan Forest? No
South of the White mountains? No
Henneth Annun? No
North of the white mountains? No
Is it the pass where Nimrodel and company attempted to cross into (later) Dol Amroth? No
If not, does it have a name? Yes
Is it in Ithilien? No

East of Ephel Duath? No

The Stonewain valley?

If you draw a straight line through Isengard (east to west) is it south of that line?

The Stonewain valley? No
If you draw a straight line through Isengard (east to west) is it south of that line? Yes

If you draw a straight line through Edoras (east to west) is it south of that line?

If you draw a straight line through Edoras (east to west) is it south of that line? Yes

now isn't this more simpler?
 

If you draw a straight line through Minas Tirith (east to west) is it south of that line?

If you draw a straight line through Minas Tirith (east to west) is it south of that line? No

If you draw a straight line through Black Gate (North to South) is it west of that line?

If you draw a straight line through Black Gate (North to South) is it west of that line? Yes

*lies in wait for Nilpaurion Felagund, battle-axe ready*
 

Is it Minas Tirith?

EDIT: Oh, wait a second. It's not a city.

Is it Cirith Ungol? Or somewhere nearby?

If you draw a straight line through Helm's Deep (North to South) is it east of that line?