Lo Parot, Monumental olive tree in Horta de Sant Joan, Spain

Lo Parot is an olive tree (Olea europaea) near Horta de Sant Joan, in the Terra Alta. It has a total height of 8 metres, a trunk girth of 7.45 metres at 1.3 metres from the ground, a rounded canopy about 8.5 metres across and a stump girth of 15 metres. Its twisted branches and small rounded crown resemble those of cultivated olives.

Lo Parot was declared a monumental tree by the Generalitat de Catalunya in 1990, and it appears on Catalonia's list of monumental trees. Local tradition attributes two thousand years of life to it, saying no farmer has ever seen it grow. In 2008 its owner, J. Badia Alcoverro, received the AEMO prize for the best monumental olive tree in Spain.

The name Lo Parot comes from local tradition and may derive from a word meaning father, as residents regard it as the father of all olive trees. This reverence reflects how the place holds special meaning in the community's identity.

The tree is accessible from the T-334 road heading toward Bot and Gandesa, turning right after roughly 500 meters onto a path through olive groves. The route passes through the typical landscape of the area and is easily reached on foot.

This tree produces olives of a distinct genetic variety with longer leaves and fruits compared to the common empeltre type found in the Terra Alta region. These botanical differences make it a valuable subject for researchers studying olive diversity.