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For the Vorta with a similar name, please see Borath.

Boreth was a inhabited class M planet in the Boreth system. This planet, located in space claimed by the Klingon Empire in the Beta Quadrant, was home to the Boreth Monastery dedicated to Kahless the Unforgettable and the most sacred place of the Klingon race. (TNG: "Rightful Heir"; DIS: "Through the Valley of Shadows")

This planet was about a day's travel from the Klingon capital Qo'noS and 12 days travel by shuttle from an unspecified location in the Gariman sector. (TNG: "Rightful Heir")

Planetary features

Boreth and its moon in 2257

Boreth had a satellite, and had lava flows visible from orbit common across its surface. (DIS: "Through the Valley of Shadows")


According to The Story of the Promise, upon departing for Sto-vo-kor, Kahless promised he would return one day and pointed to a star: "Look for me there, on that point of light." Once the Klingons developed spaceflight, the Followers of Kahless traveled to the star system and built a monastery on Boreth, a planet orbiting the star. (TNG: "Rightful Heir")

The monastery, the only structure on the planet, was built near natural lava caves, and also served to protect a rare mineral native to the planet: time crystals. As of the mid-23rd century, Klingon lives had guarded these crystals for generations. (DIS: "Through the Valley of Shadows")

The Boreth Monastery, 2257

In 2257, the Section 31 ship NCIA-93 delivered the infant child of the Chancellor of the Klingon High Council L'Rell with Voq to the planet, to be placed in the care of its monks. (DIS: "Point of Light", "Through the Valley of Shadows")

Later in 2257, a red burst appeared over the planet. The USS Discovery managed to negotiate passage to the planet from Chancellor L'Rell. After using a spore drive jump to reach the planet, Discovery' commanding officer Christopher Pike visited the monastery and managed to return with a time crystal. (DIS: "Through the Valley of Shadows")

A view of the monastery on Boreth was depicted on several viewscreens on Deep Space 9's Promenade and Replimat. (DS9: "The Muse")


See also



Background information

This planet's quadrant of origin is inferred based on the position of its star system as seen in the star chart appearing in the Star Trek: Discovery episode "Through the Valley of Shadows".

The script for "Rightful Heir" describes Boreth as "mountainous... desolate... no cities or dwellings of any kind except for a single temple situated high up on the tallest mountaintop."

The pronunciation of "Boreth" has been explained by different sources as:

  • "Rightful Heir" pronunciation guide: "BOR-reth" [1]
  • "The Way of the Warrior" pronunciation guide: "BOR-eth" [2]
  • "bore-OTH" [3]


The novelization of The Way of the Warrior had several scenes set on Boreth.

The Bajoran Ascendancy (β), from a horrific alternate future in the Star Trek: Deep Space Nine - Millennium trilogy, named a Klingon warship after the planet.

Boreth was the location of a battle between the forces of Martok and Marjod (β) in The Left Hand of Destiny, Book Two.

B'Elanna Torres, in the Voyager relaunch book series, traveled to Boreth to find her mother, Miral. Torres later decided to stay on Boreth and immerse herself in Klingon tradition.

Taking place in 2409, Boreth is also featured in the video game Star Trek Online. Alongside the clone of Kahless, the player has to fight demonic forces of the Fek'Ihri in the lava caves of the planet.

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