Sofia City Province in the context of "Iskar River"

The Iskar (Bulgarian: Искър, pronounced [ˈiskɐr]; Latin: Oescus) is a right tributary of the Danube. With a length of 368 km, it is the longest river that runs entirely within Bulgaria. Originating as three forks in Balkan's highest mountain range Rila, the Iskar flows in a northern direction until its confluence with the Danube. As it flows northwards it fuels the largest artificial lake in the country, the Iskar Reservoir, forms the divide between the Vitosha and Plana Mountains in the west and the Sredna Gora mountain range in the east before entering the Sofia Valley, which contains the nation's capital Sofia. From there the Iskar runs through the Balkan Mountains, forming the spectacular 84 km long Iskar Gorge. As it crosses the mountains, its water course turns in a north-eastern direction at Lakatnik. North of the Balkan Mountains, the river crosses the Danubian Plain and finally flows into the Danube between the villages of Baykal and Gigen. Geologically, Iskar is the oldest river in the Balkan Peninsula.

Its watershed drains 8,617 km in the provinces of Sofia, Sofia City, Vratsa, Lovech and Pleven. The Iskar flows through nine towns and numerous villages. The Iskar river basin is home to more than 50 species of fish, including Cottus haemusi that is endemic to the upper Iskar and Vit drainages.

Lozen (Bulgarian: Лозен) is a village located in the Stolichna Municipality of Sofia City Province, Bulgaria.

42°40′N 23°40′E / 42.667°N 23.667°E / 42.667; 23.667

Sofia Province (Bulgarian: Софийска област, romanized: Sofiyska oblast) is a province (oblast) of Bulgaria. The province does not include Sofia in its territories, but Sofia remains the seat of its administration. The province borders on the provinces of Pernik, Kyustendil, Blagoevgrad, Pazardzhik, Plovdiv, Lovech, Vratsa, Montana, and "Sofia City Province" (which is in a separate oblast, see Sofia Administration), and borders with Serbia to the northwest.

Republican Road I-6 (Bulgarian: Републикански път I-6) is a first class road in Bulgaria. It runs from Gyueshevo at the border with North Macedonia to Burgas on the Black Sea coast. With a total length of 508.5 km (316.0 mi), I-6 road is the longest road in Bulgaria. It is part of the European route E871 in the section Gyueshevo–Pernik and of the E773 in the stretch between the Petolachkata junction near Strazhitsa and Burgas. The road passes through nine of the 28 provinces of Bulgaria: Kyustendil, Pernik, Sofia City, Sofia, Plovdiv, Stara Zagora, Sliven, Yambol and Burgas.

The Stolichna Municipality (Bulgarian: Столична община, romanized: Stolichna obshtina (also transcribed as Stolična obština), lit. 'Capital Municipality') is an obshtina (municipality) in Sofia City Province, Western Bulgaria.It is named after its administrative centre, the city of Sofia, which is also the capital of Sofia City Province and Sofia Province and the capital of Bulgaria as well.

The municipality is located mainly in the Sofia Valley, and also in the feet and lower parts of the mountains of Stara planina and Vitosha, Plana, Lozen, Rila. As of 2016, it was home to 1,500,927 inhabitants, of which 1,400,000 live in Sofia.