The party rested at the castle for the night. The next day, as they were about to leaving, they ran into Utgarda-Loki. The latter wished to accompany them to the gates of the castle. Once at the gates, Utgarda-Loki began to speak:
"Now you have left my castle, I shall see to it you will never enter it again. The Aesir are mighty indeed. The knots to my bag were fashioned from iron and were almost undone at that. The three blows aimed at my head hit the mountain side instead. So mighty, these strikes, that the mountain was obliterated and three valleys stand in your wake."
"And Lokjr, too, is a formidable opponent. Eating at a pace almost as fast as fire itself. Even Thjalfi impressed us, racing against thought itself."
"Finally, son of Othin, most shocking to us was your performance. The horn we gave you was connected to the oceans of world. You drank with such ferocity, we were afraid you would drink it all! My cat was actually the world-serpent Jormungandr, which you raised out of the sea and into the sky. And, finally, you wrestled with old-age itself. Even here you held his own for a long, long time."
"Now, for your sake and for ours, leave, and never come back."
Realizing Thor lost only due to trickery, he became angered and wanted to destroy castle Utgard. When he turned to do so, however, it had disappeared and only an empty meadow surrounded the party.
Lokjr laughed and complimented Thor on his vigor, but insisted they should travel back. Thor accepted his friends praise and agreed it would be a mighty tale to tell. Both took one child on their back and hasted to Asgardr. Of course, stopping by the farmer to return Roskva and Thjalfi. The farmer was so impressed by his sons performance, he forgave him for injuring the Aesirs pet.
All six had a final meal together, again from Thors goats. This time Thjalfi did not drink from the goats bones. And so, Thor and Lokjr left the next morning, wishing the family a good harvest. As for Roskva and Thjalfi, they would never forget their adventure; inspiring them to never assume the worst.
What became of Thor and Lokjr? Well, that is a story for another time.