Tista

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Tista Tistedalselv, Tistedalselva[1]
Tista river in Halden, Norway
Location
Country	Norway
County	Østfold
Municipality	Halden
Physical characteristics
Source	Femsjøen lake
• location	Halden
• coordinates	59°8′4″N 11°27′41″E / 59.13444°N 11.46139°E / 59.13444; 11.46139
Mouth	Iddefjord
• location	Halden
• coordinates	59°03′N 11°24′E / 59.050°N 11.400°E / 59.050; 11.400
Length	5 km (3.1 mi)
Basin features
River system	Haldenvassdraget [no]
Landmarks	Fredriksten fortress

Tista, also called Tistedalselva or Tistakanalen,^[1] is a river in Halden municipality, in Østfold county, Norway. It is the main river in the Haldenvassdraget system and flows from Femsjøen lake to Iddefjorden fjord. The river is less than 5 km long, calculated from the dam in Femsjøen to the mouth of the fjord.