Well, there are two real tear jerkers for me. The first is the discourse between Aslan and Digory.

Up until then, Digory had been looking at the lion's huge front feet, and the huge claws on them. Now in his despair, he looked up at its face, and what he saw there surprised him as much as anything in his whole life. For that great tawny face was bent down near his own, and, wonder of wonders, great shining tears stood in the lions eyes. They were such big bright tears compared with Digory's own, that Digory thought that the lion must really be sorrier about his mother, than he was himself.

"My Son. My son, I know grief is great. Only you and I in this land know that yet. . . "

That is just so beautiful.

Another really moving moment is in the Last Battle, when the good bear is killed, and it utters its dying words of "I don't understand!" It just, to me, shows the futility of the final war, and the sadness that comes from the loss of a good friend.

I cry every time I read the part in LB when the dwarves shoot all of the horses in the end of the book!

Liberty, that moment has never made my cry, but it has definitely made me sick to my stomach. It just gives such a horrible sense of betrayal, and it stinks of death.

^^ I think it makes me cry because it's so defeating for Tirian and the others who were counting on the horses as back-up for the battle and I always find myself yelling at the dwarves in anger.....yeah, it makes me sick to my stomach too because of their betrayal.

Another really moving moment is in the Last Battle, when the good bear is killed, and it utters its dying words of "I don't understand!" It just, to me, shows the futility of the final war, and the sadness that comes from the loss of a good friend.

Oh, I always tear up at that part. Even though the good bear is mentioned later on in the "new Narnia", it's still very emotional for me every time I read it.

Also, at the end of The Voyage of the Dawn Treader, I always tear up a little at the part where Aslan tells Edmund and Lucy that they will never come back to Narnia. It always hits me in a certain spot, and I find it a very emotional scene (even though it was closely followed by one of my all-time favorite lines: "I am in your world, too... but there I have another name..."

The line that always makes me tear up or cry is the, "Do you want some milk, pussums?" by the hags in LWW. The very fact that they are taunting Aslan really bothers me, even though Lewis points out that Aslan could easily defend himself.

The one with Digory finally looking up at Aslan's face gets me too.

I would have to say the sacrifice of Aslan....I was just about in tears!

For me, it's the part where the old Narnia is destroyed. Even though there's the new Narnia, and it's better than the old Narnia, that scene where they look through the door makes me want to cry. Especially when Digory says, "I saw it begin. I did not think I would live to see it die."

Grr...I need to really go thru my books and reread them, I know there are many parts where I sort of "tear up" (not actually cry though). Ooh, the part where the Bulgy Bear dies in LB--I was actually crying last time I read that O_O. And just in general, LB...when Lucy or Jill or whomever is weeping and someone says it is good for her to weep, or something.

A part that I tear up at is when in TLB, the last few paragraphs describing Narnia slowly coming to it's end. Aslan's Country was there, of course, but the fact that good, sweet Narnia had come to an end after being corrupted always made me rather sad. I also definitely come close to tears when the Bulgy Bear dies.
And the conversation between Shasta/Cor and Aslan in HAHB always makes me tear up at its beauty, along with Aslan ripping of Eustace's dragon skin.
Several parts in LWW and MN, too, have the same effect on me.

Another really moving moment is in the Last Battle, when the good bear is killed, and it utters its dying words of "I don't understand!" It just, to me, shows the futility of the final war, and the sadness that comes from the loss of a good friend.

I agree with that.
And I'd say another moment close to tearful is when Aslan meets Shasta in the mountain pass.

Gosh I couldn't think of one or even just two so I thought I'd put my most tear inducing scene from each book as I cry reading them all at some point
So here goes in chronological order

MN - Same as above posts - the scene where Digory finally looks in Aslan's eyes and sees him crying too
LWW - Same as above again when Aslan is killed - I also cry when he is ressurected
HHB - When King Lune greets Cor / Shasta and we find out who he is - imagine from King Lune's point of view he thought he'd never see Cor again
PC - When the Pevensies have to go home - and we find out Peter and Susan aren't returning - I don't so much get upset at them not coming back but the suggestion of Lucy having her last time in a future visit
VDT - the same scene as everyone else with Aslan, Lucy, Edmund and Eustace at the worlds end
SC - Caspian's death and resurrection
LB - I actually cry right at the end because everyone's so happy and together and I have to leave and don't get to visit again - unless of course I start reading again from the beginning!

I always cry when the old Narnia is distroyed! I sob every time!

I always bawl through most of LB. It's just so depressing and sad. At least until the very end. All the destroying of Narnia...I don't know how Tirian and the loyal Narnians would have felt, "finding out" that Aslan wasn't all they thought he was.

I also cry in parts of MN. And at the end of VotDT. So sad.