Saja Umm Ar-Rimth Natural Reserve is a protected natural area located in the central part of the Kingdom of Saudi Arabia, south of Afif, in the Riyadh Region. The reserve is characterized by the diversity of its environments, ranging from low hills and open gravel plains to valleys dominated by Panicum plants, Acacia, bitter melon and wild rue.
The reserve is an important destination for Houbara bustards birds and a natural extension of their spread and breeding areas. A group of different mammals and reptiles also live in the reserve.