This report presents the first in-depth publication of preliminary data from Oued Beht, northwest Morocco, a remarkable site initially identified in the 1930s and now newly investigated. It is based on fieldwork undertaken in 2021–2022 (photogrammetry, survey and excavation), and associated study and analyses. Oued Beht is shown to be a large site of ca. 9–10 hectares in main extent, with many deep pits and convincing evidence for a full package of domesticated crops and animals. Its material culture is abundant and dense, comprising ceramics (including a local painted tradition hitherto barely attested in northwest Africa but comparable to finds in Iberia), numerous polished stone axes, grinding stones and other macrolithics, and a chipped-stone industry. Radiocarbon dates so far cluster at ca. 3400–2900 BC, but there are also indications of earlier and later prehistoric activity. What social activities Oued Beht reflects remains open to interpretation, but it emerges as a phenomenon of strong comparative interest for understanding the wider dynamics of north Africa and the Mediterranean during the fourth and third millennia BC.