Alte River

Alte River
Alte river within the village of Alte
Country	Portugal
Region	Algarve
District	Faro
Municipality	Loulé
Coordinates	37°10′51″N 8°12′28″W / 37.180972°N 8.207806°W / 37.180972; -8.207806Coordinates: 37°10′51″N 8°12′28″W / 37.180972°N 8.207806°W / 37.180972; -8.207806
Source
- location	Alte, Algarve
- coordinates	37°14′17.7″N 8°09′57.6″W / 37.238250°N 8.166000°W / 37.238250; -8.166000
Source confluence
- location	Quarteira River
- elevation	50 m (164 ft)
- coordinates	37°10′51.5″N 8°12′28.1″W / 37.180972°N 8.207806°W / 37.180972; -8.207806
Mouth	Into the Atlantic at Quarteira
Length	7.2 mi (12 km), North East to South West
Confluence of the Alte River and the Quarteira River

Alte River is a small river in the Portuguese region of the Algarve. The river along with the Algibre River, another tributary, becomes the River Quarteira after the two rivers conflux. The source of the river is a short distance east of the village of Alte and it runs for a distance of 11.6 kilometres (7.2 mi) to its confluence with the River Algibre near the village of Paderne.

The Algibre is one of a number of small rivers in the central Algarve which make up the water ecosystem known as the Querença – Silves Aquifer System.