Bogvatnet (Norwegian) or Tjoamodisjávrre (Lule Sami) is a lake in the municipality of Rana in Nordland county, Norway. The lake is located inside the Saltfjellet–Svartisen National Park, about 40 kilometres (25 mi) north of the town of Mo i Rana. The glacial lake is also the headwaters of the Blakkåga river, a tributary to the main river Ranelva.

• List of lakes in Norway
• Geography of Norway