Ruen is included in the 100 Tourist Sites of Bulgaria under No. 27.[2] The main starting points for climbing are Osogovo hut, Three Beeches hotel and the village of Gyueshevo.[2]
Two right tributaries of the river Struma spring from the Bulgarian side of Ruen — the Sovolyanska Bistritsa at 1.2 km southeast of the summit[3] and the Eleshnitsa at 400 m southwest of it.[4]
Мичев (Michev), Николай (Nikolay); Михайлов (Mihaylov), Цветко (Tsvetko); Вапцаров (Vaptsarov), Иван (Ivan); Кираджиев (Kiradzhiev), Светлин (Svetlin) (1980). Географски речник на България [Geographic Dictionary of Bulgaria] (in Bulgarian). София (Sofia): Наука и култура (Nauka i kultura).