The reserve is situated on the northern slopes of the Slavyanka mountain range at altitudes between 1140 and 2212 m. It is separated from the Pirin mountain range further north by the Paril Saddle. The mountain is formed by metamorphic Paleozoic limestone and marble that cover a granite nucleus. The territory of Ali Botush has varied geomorphological forms and a number of ridges, such as Brezata, Saint Constantine, Mitnitsata, Tepleshki Peak and Chaplen Bair.