A 235 m (771 ft; 448 cu) long, slightly inclined limestone causeway connected the valley temple to the mortuary temple.
The causeway was roofed, with narrow slits left in the ceiling slabs allowing light to enter illuminating its polychromatic bas-relief covered walls.
These included scenes with seemingly apotropaic functions, such as a scene of the king represented as a sphinx crushing Egypt's enemies under his paw.
Other scenes presented include offering bearers, animal slaughter, and the transport of the gilded pyramidion to the construction site.
Only the base of the causeway, made of large limestone blocks, has been preserved.

The scene depicting emaciated Bedouins, who have been reduced, through starvation, to skin and bone – had significant historical implications.
The scene was thought only to exist in Unas' causeway, and was thus believed to be unique eyewitness testimony to the declining living standards of Saharan Bedouins brought about by the end of the Sahara wet phase in the middle of the 3rd millennium BC.
The discovery of an identical scene in Sahure's causeway casts significant doubt onto this hypothesis.
Instead, the Egyptologist Miroslav Verner suggests that the Bedouins might have been brought into the pyramid town to demonstrate the hardships faced by pyramid builders bringing in higher quality stone from remote mountain areas.

A second discovered scene has implications for Fifth Dynasty genealogy.
In this scene, Sahure is surrounded by his family in the palace garden Wtjs-nfrw-Sahw-ra (Extolled is Sahure's beauty).
The image confirms the identity of Sahure's consort, Meretnebty, and his twin sons, Ranefer and Netjerirenre.
Ranefer, who is depicted closer to Sahure and bears the titles "king's son" and "chief lector-priest", may have been Sahure's eldest son, ascending to the throne as Neferirkare Kakai.
Netjerirenre may instead be the ephemeral ruler Shepseskare, who took the throne after Neferefre's early death.

Another significant relief discovered depicts a procession of ships, led by the king, being moored at an unidentified location.
The relief originated on the causeway south wall, and although the location depicted cannot be identified, a corresponding relief on the same wall depicts the king, his mother and wife, awaiting the arrival of ships carrying myriad goods – particular emphasis was placed on the Commiphora myrrha trees (nht n ˁntw)– from the land of Punt.
Sahure's is the earliest recorded voyage taken by the Egyptians to Punt acquiring myrrh, electrum and wood from there.

Sahure is further depicted extracting myrrh with an adze from the tree in one scene, and banqueting with his family, including his sons, and officials near the tree in another.
The trees depicted may not be Commiphora myrrha, as the use of an adze to extract resin was typically reserved for the Boswellia tree, and moreover the colour of the resin in Sahure's scene was identified by the Egyptologist Tarek El-Awady as yellow-ish brown, like Boswellia frankincense, and not red, like myrrh.
A 235 m (771 ft; 448 cu) long, slightly inclined limestone causeway connected the valley temple to the mortuary temple. The causeway was roofed, with narrow slits left in the ceiling slabs allowing light to enter illuminating its polychromatic bas-relief covered walls. These included scenes with seemingly apotropaic functions, such as a scene of the king represented as a sphinx crushing Egypt's enemies under his paw. Other scenes presented include offering bearers, animal slaughter, and the transport of the gilded pyramidion to the construction site. Only the base of the causeway, made of large limestone blocks, has been preserved.
The scene depicting emaciated Bedouins, who have been reduced, through starvation, to skin and bone – had significant historical implications. The scene was thought only to exist in Unas' causeway, and was thus believed to be unique eyewitness testimony to the declining living standards of Saharan Bedouins brought about by the end of the Sahara wet phase in the middle of the 3rd millennium BC. The discovery of an identical scene in Sahure's causeway casts significant doubt onto this hypothesis. Instead, the Egyptologist Miroslav Verner suggests that the Bedouins might have been brought into the pyramid town to demonstrate the hardships faced by pyramid builders bringing in higher quality stone from remote mountain areas.
A second discovered scene has implications for Fifth Dynasty genealogy. In this scene, Sahure is surrounded by his family in the palace garden Wtjs-nfrw-Sahw-ra (Extolled is Sahure's beauty). The image confirms the identity of Sahure's consort, Meretnebty, and his twin sons, Ranefer and Netjerirenre. Ranefer, who is depicted closer to Sahure and bears the titles "king's son" and "chief lector-priest", may have been Sahure's eldest son, ascending to the throne as Neferirkare Kakai. Netjerirenre may instead be the ephemeral ruler Shepseskare, who took the throne after Neferefre's early death.
Another significant relief discovered depicts a procession of ships, led by the king, being moored at an unidentified location. The relief originated on the causeway south wall, and although the location depicted cannot be identified, a corresponding relief on the same wall depicts the king, his mother and wife, awaiting the arrival of ships carrying myriad goods – particular emphasis was placed on the Commiphora myrrha trees (nht n ˁntw)– from the land of Punt. Sahure's is the earliest recorded voyage taken by the Egyptians to Punt acquiring myrrh, electrum and wood from there.
Sahure is further depicted extracting myrrh with an adze from the tree in one scene, and banqueting with his family, including his sons, and officials near the tree in another. The trees depicted may not be Commiphora myrrha, as the use of an adze to extract resin was typically reserved for the Boswellia tree, and moreover the colour of the resin in Sahure's scene was identified by the Egyptologist Tarek El-Awady as yellow-ish brown, like Boswellia frankincense, and not red, like myrrh.
Pyramid of Sahure