Golyam Kupen is a peak rising to 1,930 m in Vitosha Mountain

Vitosha

Vitosha is a mountain massif, on the outskirts of Sofia, the capital of Bulgaria. Vitosha is one of the tourists symbols of Sofia and the closest site for hiking, alpinism and skiing. Convenient bus lines and rope ways render the mountain easily accessible. Vitosha has the outlines of an enormous...

, Bulgaria

Bulgaria

Bulgaria , officially the Republic of Bulgaria , is a parliamentary democracy within a unitary constitutional republic in Southeast Europe. The country borders Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, as well as the Black Sea to the east...

. The peak is situated on the southern border of Bistrishko Branishte

Bistrishko Branishte

Bistrishko Branishte is a nature reserve on Vitosha Mountain in Bulgaria comprising the eastern slopes of Golyam Rezen , Malak Rezen and Skoparnik Peaks, the northern slopes of Golyam Kupen Peak , and the upper valleys of Vitoshka Bistritsa River and Yanchevska River...

 Biosphere Reserve

Biosphere reserve

The Man and the Biosphere Programme of UNESCO was established in 1971 to promote interdisciplinary approaches to management, research and education in ecosystem conservation and sustainable use of natural resources.-Development:...

, on the watershed  between Vitoshka Bistritsa

Vitoshka Bistritsa

Bistritsa or Vitoshka Bistritsa , is a river in western Bulgaria, tributary of Iskar River. Flows from the eastern slopes of Golyam Rezen Peak on Vitosha Mountain, crossing Bistrishko Branishte Nature Reserve, where it forms a small but beautiful waterfall Samokovishteto, then crossing villages of...

 to the north and Selska Reka (‘Village River’) to the south, rivers flowing eastwards to the villages of Bistritsa

Bistritsa, Sofia

Bistritsa or Bistrica is a large village in the Pancharevo municipality, located at 15 km to the south of the capital Sofia. it has 4,004 inhabitants....

 and Zheleznitsa respectively, and eventually to Iskar River

Iskar

The Iskar is, with a length of 368 km, the longest river that runs solely in Bulgaria, and a tributary of the Danube.The Iskar is formed by three rivers, the Cherni Iskar, Beli Iskar and Levi Iskar , with the source being accepted to be the Prav Iskar, a tributary of the Cherni Iskar...

.

Golyam Rezen is accessible by tracks coming from Golyam Rezen

Golyam Rezen

Golyam Rezen is a peak on Vitosha Mountain in Bulgaria. Rising to 2,277 m, the peak is second to the mountain's summit Cherni Vrah situated 900 m to the west. Golyam Rezen hosts an Air Traffic Services facility, as well as military communications installations...

 Peak in the northwest; from Aleko Centre

Aleko, Vitosha

Aleko is a site on Vitosha Mountain in Bulgaria situated at the northern foothills of Malak Rezen Peak , in the watershed of Yanchevska River draining eastwards towards the village of Bistritsa, Sofia....

 via the upper Bistrishko Branishte; and from Zheleznitsa Village in the east-southeast. Fizkulturnik Chalet is situated in the southern foothills of the peak, overlooking Kazana (‘Cauldron’) site.