Passage 6.22.8
εἰ δὲ ἐλθεῖν ἐς Ἦλιν διὰ τοῦ πεδίου θελήσειας, σταδίους μὲν εἴκοσι καὶ ἑκατὸν ἐς Λετρίνους ἕξεις, ὀγδοήκοντα δὲ ἐκ Λετρίνων καὶ ἑκατὸν ἐπὶ Ἦλιν. τὸ μὲν δὴ ἐξ ἀρχῆς πόλισμα ἦν οἱ Λετρῖνοι, καὶ Λετρεὺς ὁ Πέλοπος ἐγεγόνει σφίσιν οἰκιστής· ἐπʼ ἐμοῦ δὲ οἰκήματά τε ἐλείπετο ὀλίγα καὶ Ἀλφειαίας Ἀρτέμιδος ἄγαλμα ἐν ναῷ.
If you wish to travel to Elis through the plain, the journey to Letrinoi is one hundred and twenty stadia, and from Letrinoi to Elis again one hundred and eighty. Originally, Letrinoi was a small city established by Letreus, a son of Pelops. In my own time, however, only a few buildings remained, along with an image of Artemis Alpheiaia in a temple.