The Hobbit - Chapter 6: Out of the Frying-Pan into the Fire said:
As they went on Bilbo looked from side to side for something to eat; but the blackberries were still only in flower, and of course there were no nuts, nor even hawthorn-berries. He nibbled a bit of sorrel, and he drank from a small mountain-stream that crossed the path, and he ate three wild strawberries that he found on its bank, but it was not much good.
They still went on and on. The rough path disappeared. The bushes, and the long grasses, between the boulders, the patches of rabbit-cropped turf, the thyme and the sage and the marjoram, and the yellow rockroses all vanished, and they found themselves at the top of a wide steep slope of fallen stones, the remains of a landslide. When they began to go down this, rubbish and small pebbles rolled away from their feet; soon larger bits of split stone went clattering down and started other pieces below them slithering and rolling; then lumps of rocks were disturbed and bounded off, crashing down with a dust and a noise. Before long the whole slope above them and below them seemed on the move, and they were sliding away, huddled all together, in a fearful confusion of slipping, rattling, cracking slabs and stones.
It was the trees at the bottom that saved them. They slid into the edge of a climbing wood of pines that here stood right up the mountain slope from the deeper darker forests of the valleys below. Some caught hold of the trunks and swung themselves into lower branches, some (like the little hobbit) got behind a tree to shelter from the onslaught of the rocks. Soon the danger was over, the slide had stopped, and the last faint crashes could be heard as the largest of the disturbed stones went bounding and spinning among the bracken and the pine-roots far below.
"Well! that has got us on a bit", said Gandalf; "and even goblins tracking us will have a job to come down here quietly".
"I daresay", grumbled Bombur; "but they wont find it difficult to send stones bouncing down on our heads." The dwarves (and Bilbo) were feeling far from happy, and were rubbing their bruised and damaged legs and feet.
"Nonsense! We are going to turn aside here out of the path of the slide. We must be quick! Look at the light!" The sun had long gone behind the mountains. Already the shadows were deepening about them, though far away through the trees and over the black tops of those growing lower down they could still see the evening lights on the plains beyond. They limped along now as fast as they were able down the gentle slopes of a pine forest in a slanting path leading steadily southwards. At times they were pushing through a sea of bracken with tall fronds rising right above the hobbits head; at times they were marching along quiet as quiet over a floor of pine-needles; and all the while the forest-gloom got heavier and the forest-silence deeper. There was no wind that evening to bring even a sea-sighing into the branches of the trees.
[...]
After what seemed ages further they came suddenly to an opening where no trees grew. The moon was up and was shining into the clearing. Somehow it struck all of them as not at all a nice place, although there was nothing wrong to see.
All of a sudden they heard a howl away down hill, a long shuddering howl. It was answered by another away to the right and a good deal nearer to them; then by another not far away to the left. It was wolves howling at the moon, wolves gathering together!
[...]
"Up the trees quick!" cried Gandalf; and they ran to the trees at the edge of the glade, hunting for those that had branches fairly low, or were slender enough to swarm up. They found them as quick as ever they could, you can guess; and up they went as high as ever they could trust the branches. You would have laughed (from a safe distance), if you had seen the dwarves sitting up in the trees with their beards dangling down, like old gentlemen gone cracked and playing at being boys. Fili and Kili were at the top of a tall larch like an enormous Christmas tree. Dori, Nori, On, Oin, and Gloin were more comfortable in a huge pine with regular branches sticking out at intervals like the spokes of a wheel. Bifur, Bofur, Bombur, and Thorin were in another. Dwalin and Balin had swarmed up a tall slender fir with few branches and were trying to find a place to sit in the greenery of the topmost boughs. Gandalf, who was a good deal taller than the others, had found a tree into which they could not climb, a large pine standing at the very edge of the glade. He was quite hidden in its boughs, but you could see his eyes gleaming in the moon as he peeped out.
[...]
This glade in the ring of trees was evidently a meeting-place of the wolves.
[...]
Goblins do not usually venture very far from their mountains, unless they are driven out and are looking for new homes, or are marching to war (which I am glad to say has not happened for a long while). But in those days they sometimes used to go on raids, especially to get food or slaves to work for them. Then they often got the Wargs to help and shared the plunder with them. Sometimes they rode on wolves like men do on horses. Now it seemed that a great goblin-raid had been planned for that very night. The Wargs had come to meet the goblins and the goblins were late. The reason, no doubt, was the death of the Great Goblin, and all the excitement caused by the dwarves and Bilbo and the wizard, for whom they were probably still hunting.
In spite of the dangers of this far land bold men had of late been making their way back into it from the South, cutting down trees, and building themselves places to live in among the more pleasant woods in the valleys and along the river-shores. There were many of them, and they were brave and well-armed, and even the Wargs dared not attack them if there were many together, or in the bright day. But now they had planned with the goblins help to come by night upon some of the villages nearest the mountains. If their plan had been carried out, there would have been none left there next day; all would have been killed except the few the goblins kept from the wolves and carried back as prisoners to their caves.
[...]
"Whats all this uproar in the forest tonight?" said the Lord of the Eagles. He was sitting, black in the moonlight, on the top of a lonely pinnacle of rock at the eastern edge of the mountains. "I hear wolves voices! Are the goblins at mischief in the woods?"
He swept up into the air, and immediately two of his guards from the rocks at either hand leaped up to follow him.
[...]
Eagles are not kindly birds. Some are cowardly and cruel. But the ancient race of the northern mountains were the greatest of all birds; they were proud and strong and noble-hearted. They did not love goblins, or fear them. When they took any notice of them at all (which was seldom, for they did not eat such creatures ), they swooped on them and drove them shrieking back to their caves, and stopped whatever wickedness they were doing. The goblins hated the eagles and feared them, but could not reach their lofty seats, or drive them from the mountains. [>> Goblins mostly live below ground in the Misties]
[...]
The wolves that had caught fire and fled into the forest had set it alight in several places. It was high summer, and on this eastern side of the mountains there had been little rain for some time. Yellowing bracken, fallen branches, deep-piled pine-needles, and here and there dead trees, were soon in flames. All round the clearing of the Wargs fire was leaping. But the wolf-guards did not leave the trees. Maddened and angry they were leaping and howling round the trunks, and cursing the dwarves in their horrible language, with their tongues hanging out, and their eyes shining as red and fierce as the flames.
[...]
The pale peaks of the mountains were coming nearer, moonlit spikes of rock sticking out of black shadows. Summer or not, it seemed very cold. [...] He loosed Doris ankles with a gasp and fell onto the rough platform of an eagles eyrie.
[...]
Soon another eagle flew up. "The Lord of the Eagles bids you to bring your prisoners to the Great Shelf" [...] Very soon Bilbo was laid down, trembling with fear, on a wide shelf of rock on the mountain-side. There was no path down on to it save by flying; and no path down off it except by jumping over a precipice. There he found all the others sitting with their backs to the mountain wall.
[...]
As Bilbo listened to the talk of Gandalf he realized that at last they were going to escape really and truly from the dreadful mountains. He was discussing plans with the Great Eagle for carrying the dwarves and himself and Bilbo far away and setting them down well on their journey across the plains below.
[...]
The Lord of the Eagles would not take them anywhere near where men lived. "They would shoot at us with their great bows of yew," he said, "for they would think we were after their sheep. And at other times they would be right. No! we are glad to cheat the goblins of their sport, and glad to repay our thanks to you, but we will not risk ourselves for dwarves in the southward plains."