Nahr al-Kabir

The Nahr al-Kabir, also known in Syria as al-Nahr al-Kabir al-Janoubi or in Lebanon simply as the Kebir, is a river in Syria and Lebanon flowing into the Mediterranean Sea at Arida. The river is long, and drains a watershed of. Its headwaters are at the Ain as-Safa spring in Lebanon and it flows through the Homs Gap in the Orontes River Valley of southern Syria.
The river forms the northern part of the Lebanon–Syria border at the Jebel Ansariyah mountains in Syria. In antiquity, the river was known as Eleutherus. It defined the border between the Seleucid and Ptolemaic empires during much of the 3rd century BCE.
The river is mentioned by Josephus and in 1 Maccabees 11:7 and 12:30.
Due to its shallowness, the river was a key site of the Syrian refugee crisis since 2011. It was a location for people smuggling and drug trafficking. It flooded in 2019, inundating Lebanon’s largest Syrian refugee camp. Later, many Syrians returned across the river fleeing the Israel–Hezbollah conflict (2023–2024). River crossings were bombed by Israel in November 2024. After the fall of the Assad regime in December 2024, thousands crossed it irregularly to return to or informally visit Syria. Thousands of refugees fled across the river into Lebanon during the 2025 massacres of Syrian Alawites.