Helicon rises in western Boeotia above the country of Thespiae and Ascra. Pausanias praises it as one of the most fertile mountains of Greece, rich in cultivated trees, wild strawberries and useful plants. He even records the local belief that the mountain's forage made snake venom less deadly. These observations matter because Helicon was not imagined as an abstract peak isolated from ordinary life. It was a worked landscape of pasture, settlement, springs and ritual paths.

The oldest surviving literary image of Helicon comes from Hesiod. At the beginning of the Theogony the Muses keep the great and holy mountain, bathe in Permessus, Hippocrene or Olmeius, and dance upon its heights before moving through the night in song. Hesiod then says that the Muses taught him glorious song while he was shepherding his lambs beneath Helicon and gave him a flourishing laurel staff. The poem does not say that this calling happened at Hippocrene itself, so the general mountain setting should be kept distinct from later attempts to localise the event at a particular spring.

Pausanias preserves a layered local cult history. He says Ephialtes and Otus were remembered as the first to sacrifice to the Muses on Helicon and that this early form of the cult honoured three Muses called Melete, Mneme and Aoede, Practice, Memory and Song. He then reports that a Macedonian Pierus later established nine Muses at Thespiae. These statements are local religious traditions recorded in the Roman period, not a documented historical chronology of how the number nine developed everywhere in Greece.

The mountain's waters acquired their own identities. Pausanias places Aganippe on the approach to the grove of the Muses and says its namesake nymph was a daughter of the Termessus. About twenty stades above the grove lay Hippocrene, the Horse's Fountain, which Pausanias says Pegasus created by striking the ground with his hoof. Hesiod already knows a Horse's Spring on Helicon, but he does not tell the Pegasus origin story. That explanatory myth belongs to later tradition.

Callimachus used Hippocrene as the setting for another Heliconian myth. In his Hymn to Athena, Athena and the nymph Chariclo bathe at the Horse's Fountain when the young Tiresias accidentally sees the goddess unclothed. He loses his sight, and Athena compensates him with prophetic powers, knowledge of birds, a guiding staff and exceptional honour after death. The episode attaches divine danger and prophetic authority to the same landscape that elsewhere represents poetic inspiration.

The sanctuary below the heights contained images of the Muses together with poets, musicians and gods. Pausanias describes Thamyris blinded with a broken lyre, Arion riding a dolphin, Orpheus surrounded by listening creatures, a seated Hesiod, Dionysus and other figures. The Thespians held the Museia there, with musical competition and dedications including tripods. The grove was therefore a functioning religious and competitive centre rather than merely a poetic metaphor.

Helicon also became a character in mythic competition. Corinna's fragment is conventionally read as a singing contest between personified Mount Helicon and Mount Cithaeron, with Cithaeron winning the vote of the gods. The defeated Helicon tears out a rock and hurls it down so that it shatters. Antoninus Liberalis preserves a different musical contest, between the Muses and the daughters of Pierus, in which Helicon swells towards the sky with delight at the Muses' performance until Pegasus checks its rise with a hoof strike.

These traditions should not be collapsed into one event. Hesiod's sacred mountain, Pausanias's sanctuary, Callimachus's Tiresias episode, Corinna's personified contest and the Pierides transformation belong to different authors and periods. Together they explain why Helicon became one of the most durable Greek symbols of inspired speech: a real Boeotian landscape continually reinterpreted through poetry, cult and myth.