The Olt is a river in Romania. It is 615 km (382 mi) long, and its basin area is 24,050 km2 (9,290 sq mi). It is the longest river flowing exclusively through Romania. Its source is in the Hășmaș Mountains of the eastern Carpathian Mountains, near Bălan, rising close to the headwaters of the river Mureș. It flows through the Romanian counties Harghita, Covasna, Brașov, Sibiu, Vâlcea and Olt. The river was known as Alutus or Aluta in Roman antiquity. Olt County and the historical province of Oltenia are named after the river.
Măieruș is a commune in Brașov County, Transylvania, Romania, on the left of Olt river. It is located 30 km away from the county capital Brașov. It is composed of two villages, Arini (Lüget) and Măieruș. The settlement is mentioned for the first time in 1377 as "villa nucum".
The Aita is a right tributary of the river Olt in Romania. It discharges into the Olt in Aita Mare. Its length is 25 km (16 mi) and its basin size is 132 km2 (51 sq mi).
The Someșul Mare is a river in north-western Romania, originating in the Bistrița-Năsăud County in the Rodna Mountains at the confluence of two headwaters — the Preluci and the Zmeu. The Someșul Mare flows west through Rodna, Năsăud and Beclean, until it meets the Someșul Mic at Mica, upstream of Dej. Its length is 130 km (81 mi) and its basin size is 5,033 km2 (1,943 sq mi). Downstream from its confluence with the Someșul Mic, the river is called Someș.
The Avrig is a left tributary of the river Olt in Romania. It discharges into the Olt in the town Avrig. The upper reach of the river is also known as Râul Mare. Its source is the Avrig Lake in the Făgăraș Mountains. Its length is 24 km (15 mi) and its basin size is 66 km2 (25 sq mi).
The Iminog is a left tributary of the river Olt in Romania. It discharges into the Olt in Mărunței. Its length is 50 km (31 mi) and its basin size is 220 km2 (85 sq mi).
The Cormoș is a right tributary of the river Olt in Romania. It discharges into the Olt in Augustin. Its length is 54 km (34 mi) and its basin size is 545 km2 (210 sq mi).
The Vâlcele is a right tributary of the river Olt in Romania. It discharges into the Olt in Araci. Its length is 11 km (6.8 mi) and its basin size is 32 km2 (12 sq mi).
The Ghimbășel is a left tributary of the river Bârsa in Romania. Its source is in the northern part of the Bucegi Mountains. Originally it discharged directly into the Olt, but much of its flow has been diverted into the Bârsa, another tributary of the Olt, near Colonia Bod. Its length is 67 km (42 mi) and its basin size is 533 km2 (206 sq mi). The former lower course of the Ghimbășel, downstream of this diversion, still exists and is used for the discharge of local inflows. It flows into the Olt north of Bod. Its length is 6 km (3.7 mi) and its basin size is 8 km2 (3.1 sq mi).
The Lotrioara is a right tributary of the river Olt in Romania. Its source is in the Lotru Mountains. It discharges into the Olt in Lazaret. Its length is 25 km (16 mi) and its basin size is 120 km2 (46 sq mi).
The Olteț is a right tributary of the river Olt in Romania. It discharges into the Olt in Fălcoiu. Its total length is 185 km (115 mi), and its drainage basin area is 2,663 km2 (1,028 sq mi).
The Valea Crișului is a right tributary of the river Olt in Romania. It flows into the Olt in Ghidfalău. Its length is 16 km (9.9 mi) and its basin size is 33 km2 (13 sq mi).
The Vad is a right tributary of the river Olt in Romania. It discharges into the Olt in Lazaret. Its length is 12 km (7.5 mi) and its basin size is 46 km2 (18 sq mi).
The Valea Roșie is a left tributary of the river Olt in Romania. It discharges into the Olt near Bixad. Its length is 11 km (6.8 mi) and its basin size is 33 km2 (13 sq mi).
The Bârsa is a left tributary of the river Olt in Romania. It discharges into the Olt near Feldioara. Its source is in the Făgăraș Mountains. As several tributaries also have the name Bârsa, in order to differentiate them, the main course of the river is frequently referred to as Bârsa Mare. The river Ghimbășel, formerly a direct tributary of the Olt, was redirected towards the Bârsa. Its length is 73 km (45 mi) and its basin size is 937 km2 (362 sq mi).
The Dârjov is a left tributary of the river Olt in Romania. It discharges into the Olt in Ipotești. Its length is 35 km (22 mi) and its basin size is 161 km2 (62 sq mi).
The Breaza is a left tributary of the river Olt in Romania. It discharges into the Olt in Voila. Its source is in the Făgăraș Mountains. Its length is 33 km (21 mi) and its basin size is 65 km2 (25 sq mi).
The Sebeș is a left tributary of the river Olt in Romania. It discharges into the Olt east of Făgăraș. Its source is in the Făgăraș Mountains. Its length is 38 km (24 mi) and its basin size is 94 km2 (36 sq mi).
The Băiaș is a left tributary of the river Olt in Romania. It discharges into the Olt in Copăceni. Its length is 19 km (12 mi) and its basin size is 87 km2 (34 sq mi).
The Sălătrucel is a left tributary of the river Olt in Romania. It discharges into the Olt in Călimănești. Its length is 15 km (9.3 mi) and its basin size is 99 km2 (38 sq mi).
