The Tóraigheacht Dhiarmada agus Ghráinne (“The Pursuit of Diarmuid and Gráinne”) is the great love story of the Irish Fenian Cycle. A young princess, betrothed to the aging hero Fionn mac Cumhaill, falls in love at their wedding feast with one of Fionn’s own warriors, the handsome Diarmuid Ua Duibhne. She forces him to elope with her, and for years Fionn pursues them across the length and breadth of Ireland. The story ends at Ben Bulben in County Sligo, with a wild boar, a dying hero, and a cup of water that Fionn lets slip through his hands.
The fullest surviving version was written down in the early modern period (the oldest manuscript is from the seventeenth century), but the story is much older: it is mentioned in a tenth-century list of tales. Scattered across Ireland are hundreds of prehistoric stone tombs known locally as “Diarmuid and Gráinne’s beds”, where the lovers were said to have slept on each night of their flight.
The Betrothal
Fionn mac Cumhaill, leader of the Fianna, was growing old. His wife had died, and his son Oisín and the warrior Diorruing suggested that he marry again. They proposed Gráinne, daughter of Cormac mac Airt, the High King of Ireland, the most beautiful woman of her time. Cormac agreed, and Gráinne did not object, though she remarked that if Fionn was a fitting son-in-law for her father, she did not see why he should not be a fitting husband for her.
A great betrothal feast was held at Tara.
The Spot of Love
At the feast, Gráinne looked around at the guests and asked the druid Daire about each of them. When she saw Fionn, she learned that he was older than her father. Her eyes moved on to Diarmuid Ua Duibhne, a young, dark-haired warrior of the Fianna, famous for his courage, his generosity, and his beauty.
Diarmuid had a ball seirce, a “love spot,” on his forehead. Years earlier, he and three companions had spent the night in a hut where a young woman — who was in fact Youth herself — had touched his forehead and left a spot that would make any woman who saw it fall in love with him. Diarmuid usually kept it hidden under his hair or a cap. At the feast, Gráinne saw it.
The Geis
Gráinne had a sleeping draught put into a golden goblet and passed around the hall. Everyone who drank fell asleep — except Diarmuid, Oisín, Oscar (Oisín’s son), and a few others, whom she had passed over. Then she went to Oisín and asked him to be her lover. He refused, out of loyalty to his father. Then she went to Diarmuid.
Diarmuid refused too. He would not betray his lord, Fionn. So Gráinne put him under a geis — a sacred, unbreakable obligation, which it would bring disgrace and ruin to disobey — to take her away from Tara that very night, before Fionn and her father awoke.
Diarmuid asked his comrades what he should do. They all told him that he must honour the geis, whatever the consequences. Oisín said: “You are not guilty of the geis laid on you.” Diarmuid wept. Then he left Tara with Gráinne. She slipped out through a wicket gate; Diarmuid, who would not leave by a wicket like a common man, vaulted over the rampart on the shafts of his spears.
The Pursuit
When Fionn woke and found them gone, his jealousy and humiliation were overwhelming. He set out with the Fianna in pursuit.
The pursuit lasted for years (some versions say seven, some sixteen). It is the heart of the tale. The lovers fled from one place to another: through forests, across rivers, into caves, onto islands. Diarmuid built a hut in the wood of Doire Dhá Bhoth with seven doors, and when Fionn surrounded it, Diarmuid escaped by leaping over the heads of the Fianna. At one point he refused to eat raw meat or sleep in the same place twice, following advice to stay ahead of the pursuers.
The lovers had allies. Aengus Óg, the god of love of the Tuatha Dé Danann, was Diarmuid’s foster-father, and he came several times to rescue them, carrying Gráinne away under his magic cloak, invisible, while Diarmuid fought his way out.
Diarmuid’s Restraint
For a long time, Diarmuid refused to become Gráinne’s lover, out of loyalty to Fionn. To show Fionn that he had not dishonoured him, he left a piece of uncooked meat or unbroken bread at each place where they had rested, as a sign.
According to one famous episode, the change came when they were crossing a stream. A splash of water struck Gráinne’s leg, and she said (in effect) that the water was bolder than Diarmuid. Stung, Diarmuid gave up his restraint, and from then on they lived as husband and wife. They had several children.
The Quicken Tree
One of the most famous episodes takes place in the Wood of Dubhros, where a magical rowan (quicken) tree, brought from the Otherworld, bore berries that had the taste of honey, and that could cure any illness and restore youth. It was guarded by a fearsome one-eyed giant, Searbhán, whom no weapon could harm except his own iron club. Diarmuid and Gráinne made a pact with the giant to live in the wood. But Gráinne, pregnant, longed for the berries, and Diarmuid killed the giant with his own club to get them for her.
Fionn tracked them to the tree. He sat beneath it playing a game of fidchell (a board game) with Oisín, knowing that Diarmuid was hidden in the branches above. When Oisín was losing, Diarmuid dropped a berry onto the board to show him the winning move. Three times it happened. “It is no wonder you won, Oisín,” said Fionn, “with the help of Diarmuid.” He looked up and saw them.
Peace, For a Time
At last, through the intervention of Aengus Óg and Cormac mac Airt, peace was made. Diarmuid and Gráinne were given lands at Rath Ghráinne in the west, and Fionn gave up his pursuit. For years they lived in peace and had four sons and a daughter.
But Fionn had not forgotten.
The Boar of Ben Bulben
Diarmuid was under another geis: he must never hunt a boar. Long before, when he was a child, his father had killed a steward’s son. The steward struck the dead child with a druid’s wand, and he became a boar without ears or tail, fated to live as long as Diarmuid and to cause his death.
One night Diarmuid heard the baying of hounds and went out. Fionn and the Fianna were hunting the Boar of Ben Bulben (Beann Ghulbain), the enchanted boar. Fionn told Diarmuid that it was forbidden for him to hunt it — but did not stop him. Diarmuid stayed to face the boar.
The boar charged. Diarmuid’s spear glanced off it, and his sword broke. The boar tossed him, and Diarmuid killed it with the hilt of his sword — but the boar’s tusks ripped open his side.
The Water from Fionn’s Hands
Fionn came and stood over the dying Diarmuid. “I like to see you like this, Diarmuid,” he said. “I wish all the women of Ireland could see you now: your beauty turned to ugliness.”
Diarmuid reminded Fionn that he had the power to heal. Anyone who drank water from Fionn’s hands would be healed of any wound. He reminded Fionn of all the times he had saved his life. Oscar, Fionn’s own grandson, demanded that Fionn heal him.
Fionn went to a spring nine paces away and brought water in his hands. But as he walked back, he remembered Gráinne, and let the water spill through his fingers. Oscar pressed him. He went a second time and again remembered Gráinne and let it spill. The third time, he brought the water to Diarmuid — but it was too late. Diarmuid was dead.
After Diarmuid
Aengus Óg carried Diarmuid’s body to Brú na Bóinne (Newgrange), where he would breathe life into it for a while each day so that he could talk with him.
Gráinne’s response differs among versions. In some, she raised her sons to avenge their father. In others, Fionn won her back with persistence and flattery, and she returned to him, and the Fianna laughed at her.
The Story’s Legacy
The tale has close parallels with the Arthurian legend of Tristan and Isolde, in which a young knight elopes with the bride of his aging lord and uncle (see Tristan and Isolde), and with Lancelot and Guinevere. Some scholars believe the Irish story influenced the Arthurian ones.
The pursuit left its mark on the Irish landscape. Portal tombs and dolmens across the country are still called Leaba Dhiarmada agus Ghráinne, “the bed of Diarmuid and Gráinne,” and it was once believed that a childless couple who slept in one would have children. The flat-topped mountain of Ben Bulben, where Diarmuid died, is also where W. B. Yeats chose to be buried, “under bare Ben Bulben’s head.”
Last reviewed: September 2026.