Bulgaria
Bulgaria occupies a portion of the eastern Balkan peninsula, bordering five countries—Greece and Turkey to the south, Macedonia and Serbia to the west, and Romania to the north. The land borders have a total length of , and the coastline has a length of . Its total area of ranks it as the world's 105th-largest country. Bulgaria's geographic coordinates are 43° N 25° E. The most notable topographical features are the Danubian Plain, the Balkan Mountains, the Thracian Plain, and the Rhodope Mountains. The southern edge of the Danubian Plain slopes upward into the foothills of the Balkans, while the Danube defines the border with Romania. The Thracian Plain is roughly triangular, beginning southeast of Sofia and broadening as it reaches the Black Sea coast.
Balkan Athletics Indoor Championships
A total of seventeen nations have entered the competition during its history, with Yugoslavia and Serbia and Montenegro being former competitors; all successor states of Yugoslavia have since competed independently, bar Kosovo. The initial competition was between six nations, which expanded to nine by the end of the 1990s. The number of competing nations was further expanded between 2011 and 2014, with five more countries being admitted by the ABAF. Azerbaijan has also competed as a guest nation; its performances were discounted for medal and points-scoring purposes. Romania and Greece have historically been the most successful nations at the event, although Turkey has been the most dominant since 2012.
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