Tre Volost was a territorial division (a volost

Volost

Volost was a traditional administrative subdivision in Eastern Europe.In earlier East Slavic history, volost was a name for the territory ruled by the knyaz, a principality; either as an absolute ruler or with varying degree of autonomy from the Velikiy Knyaz...

) of the Novgorod Republic

Novgorod Republic

The Novgorod Republic was a large medieval Russian state which stretched from the Baltic Sea to the Ural Mountains between the 12th and 15th centuries, centred on the city of Novgorod...

.

It was first mentioned in a 1265 treaty of Yaroslav Yaroslavich with Novgorod, and was later also mentioned in other documents dated as late as 1471.

Tre Volost bordered Kolo Volost

Kolo Volost

Kolo Volost was a territorial division of the Novgorod Republic.It was first mentioned in the 13th century. The last documentary mention of the volost was in the 15th century....

 approximately along the line between Kildin Island

Kildin Island

Kildin is a small Russian island in the Barents Sea, off the Russian shore and about 120 km from Norway. Administratively, Kildin belongs to the Murmansk Oblast of the Russian Federation....

 and Turiy Headland

Headland

A headland is a point of land, usually high and often with a sheer drop, that extends out into a body of water.Headland can also refer to:*Headlands and bays*headLand, an Australian television series...

 of the Turiy Peninsula

Turiy Peninsula

Turiy Peninsula is peninsula located in Murmansk Oblast, Russia. It is the biggest peninsula on the south of Kola Peninsula. It protrudes into the White Sea, with Sosnovaya Bay to the west, and Karzh Bay to the ost.- Sources :*...

. Tre Volost was situated to the east of that line, while Kolo Volost laid to the west of it.