Biryubash (; , Böröbaş; , Pürömučaš) is a rural locality (a village) in Novotroitsky Selsoviet, Mishkinsky District, Bashkortostan, Russia. The population was 378 as of 2010. There are 3 streets.
Geography Biryubash is located 27 km northeast of Mishkino (the district's administrative centre) by road. Refandy is the nearest rural locality.Расстояние от Бирюбаша до Мишкина
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