Boromir was born in the year 2978 of the Third Age to Denethor II and Finduilas, daughter of Adrahil of Dol Amroth. His younger brother, Faramir, was born in the year 2983. The following year, Denethor became Steward of Gondor, succeeding his father, Ecthelion II.
After Finduilas' death, Denethor became somber, cold and detached from his family. As their father withdrew, the relationship between Faramir and Boromir grew closer and greater in love. Denethor always favoured Boromir over Faramir, but this caused no rivalry between the two brothers. Boromir always protected and helped Faramir. Boromir was judged to be the more daring one, as well as the more fearless. His fearlessness and greatness in battle was known beyond Gondor's borders.
In response to a prophetic dream that he and his brother had, Boromir claimed the duty of riding to Rivendell from Minas Tirith in T.A. 3018. During the time of his arrival, the Council of Elrond was commencing. It is here that he first appears in The Fellowship of the Ring. There he tells his story of Gondor's attempts to keep the powers of Mordor at bay. He then attempted to persuade the Council to let him take the One Ring to Gondor so that it could be used in the defense of the realm, but was told that it could not be used without corrupting its user and alerting Sauron to its presence.
He subsequently joined the Fellowship of the Ring and travelled with them south from Rivendell. Before departing, Boromir blew the Horn of Gondor loudly, saying that he "would not go forth like a thief into the night". RElrond, lord of the Elves in Rivendell, then warned him not to blow it again until he had reached the border of Gondor.
The Fellowship, after failing to climb eastward over the Misty Mountains, passed through the former Dwarven realm of Moria and then the Elven realm of Lórien. In Lórien, Boromir was greatly disturbed by the Lady Galadriel's testing of his mind, telling the quest's leader, Aragorn, "not to be too sure of this lady and her purposes." Before Boromir left Lórien, he received the gifts of a golden belt and an Elven-cloak. On the quest he proved his worth and reputation. He slew many Orcs and at least one Warg on the journey.
Boromir was always in favour of taking the Ring to Minas Tirith despite his duty to help destroy it. He openly shared this with Aragorn after Gandalf's apparent death, but it was chosen that it would be taken to Mordor. Boromir felt that it would be better to use the Ring in Gondor's defense than to throw it away. Eventually, he plotted to take the Ring for himself, justifying his treachery to himself with his duty to his people and his belief in his own superiority.
"True-hearted Men, they will not be corrupted. We of Minas Tirith have been staunch through long years of trial. We do not desire the power of wizard-lords, only strength to defend ourselves, strength in a just cause. And behold! in our need chance brings to light the Ring of Power. It is a gift, I say; a gift to the foes of Mordor. It is mad not to use it, to use the power of the Enemy against him. The fearless, the ruthless, these alone will achieve victory. What could not a warrior do in this hour, a great leader? What could not Aragorn do? Or if he refuses, why not Boromir? The Ring would give me power of Command. How I would drive the hosts of Mordor, and all men would flock to my banner!"
The Fellowship of the Ring, "The Breaking of the Fellowship"
After seeing that Ringbearer Frodo Baggins was unconvinced by his reasoning, Boromir simply commanded him to yield the Ring to him. Frodo still refused. Boromir then moved to seize the Ring for himself. Frodo put the Ring on and fled, intending to continue the quest alone. Boromir, realizing what had happened, repented of his actions, but it was too late. Searching unsuccessfully for Frodo, he notified the rest of the Fellowship of Frodo's absence. This and the subsequent attack by Orcs, led to the breaking of the Fellowship. The Fellowship of the Ring ends with Samwise Gamgee finding Frodo and going with him, leading directly to the start of The Two Towers, in which the Orc-attack and its aftermath is featured.
During the scattered fighting, Boromir was mortally wounded while defending Merry and Pippin in an attempt to prevent their capture thereby redeeming himself for trying to take the Ring. The fighting is not directly depicted in the book, but rather through Pippin's thoughts in the second chapter of The Two Towers.
Blasts from Boromir's horn alerted Aragorn (who had not fought any Orcs), but he came too late to prevent the Hobbits' capture. Before he died, Boromir charged him to prevent his city, Minas Tirith, from falling, as he had failed it. Aragorn, Gimli, and Legolas used one of their boats as a funeral boat for Boromir's body, placing his sword, belt, cloak, broken horn, and the weapons of his slain foes. Aragorn, Gimli and Legolas sang "Lament of the Winds" as his funeral song.
On February 26, 3019 T.A. he passed over the Falls of Rauros
Three days later, Faramir found the boat bearing his dead brother floating down the River Anduin, to his and their father's great grief.
From "The Departure of Boromir"-
"But in Gondor in after-days it long was said that the elven-boat rode the falls and the foaming pool, and bore him down through Osgiliath, and past the many mouths of Anduin, out into the Great Sea at night under the stars."
Source : Wikipedia
Birth - Death : 2978 T.A. -February 26 3019 T.A.
Titles : Captain of the White Tower, Captain-General, High Warden of the High Tower, Steward-prince of Gondor.
Race : Men
Culture : Godorian, House of Húrin.
Boromir son of Denethor was a man of Gondor who was the son of the current Steward of Gondor. He was the eldest child, having only one brother Faramir, and so would have taken over as Steward after Denethor's death. However, he was slain by Uruk-Hai during the Quest of the Ring on the shores of Anduin. He fell defending the two hobbits Merry and Pippin, two members of the Fellowship of the Ring. Aragorn, Legolas, and Gimli laid him to rest inside one of the boats of Lorien, and sent him down the falls of Rauros.
Boromir was a valiant warrior, having already achieved great merit in Gondor prior to the Council of Elrond. He was sent to Rivendell to decipher a cryptic rhyme that both he and his younger brother heard in their dreams:
Seek for the Sword that was broken,
In Imladris it dwells,
There shall be counsels taken,
Stronger than Morgul-spells.
There shall be shown a token,
That Doom is near at hand,
For Isildur's Bane shall waken,
An the Halfling forth shall stand.
Denethor counselled Boromir to journey to Imladris (Rivendell) to seek the meaning of these words. And so he went - and became greatly involved in the Quest of the Ring, as a member of the Fellowship.
Before he died, he became allured by the One Ring that Frodo held, and attempted to seize it from him. It can be said that he paid the price of his life for such a deed.
Nonetheless he perished in honour, while protecting the Company, and he was laid in Anduin to float down to Rauros falls, and though rumour came to his near kindred of his death, and the horn that he bore came back to Denethor, his body was laid in Rauros, and there he remained ever after.