Trubezh - a river in the Pereslavl region of the Yaroslavl region of Russia , flows into Lake Pleshcheevo . It is the main tributary of the lake.
|The mouth of the Trubezh River near the church of the Forty Martyrs in Pereslavl .|
|Water system||Pleshcheyevo Lake → Veksa → Somino → Nerl → Volga → Caspian Sea|
|- source - mouth|
The source of the Trubezh is located in the Berendeyevsky swamp (the watershed of the river basins of the Oka and the Upper Volga). Trubezh is formed from the confluence of two streams - the Worker, originating from springs near the ancient village of Petrovskoye, and Chernavka, originating from the Berendeyev swamp. The length of the river is 36 km, the catchment area is 245 km², which is almost 58% of the catchment area of Lake Pleshcheeva. The flow of the river is slow, at the end of summer it is the opposite (from the mouth up).
In the 1930s and 1950s, Trubnitsa and Chernavka were full-flowing rivers with high banks, diversity and abundance of fish, pine forests. The drainage of swamps and wetlands led to a decrease in groundwater levels and redistribution of water volumes. Therefore, the once full-flowing river Trubezh turned into a "stream", since the underground supply of the Trubezh and all other tributaries of the lake decreased.
The bottom is covered with a thick layer of urban and factory waste. The channel is littered with fallen trees and sunken boats.  As of November 2009, the river was cleared of silt and debris within the city to the mouth.
At the mouth of the Trubezh River is Rybnaya Sloboda , one of the districts of the city of Pereslavl-Zalessky .
A water protection zone 100 meters wide runs along the river Trubezh, where economic activity is strictly limited. It is forbidden to store garbage, parking, car wash and car repair. 
- Surface Water Resources of the USSR: Hydrological Understanding. T. 10. Upper Volga region / ed. V.P. Shaban. - L .: Gidrometeoizdat, 1966 .-- 528 p.
- Yaroslavl region. 308.12 thousand rubles were allocated for cleaning up the rubble of the Trubezh river. // IA Regnum. - 2003. - June 9.
- Kochura, A. Water protection zone and coastal strip of Lake Plescheevo // Pereslavl springs . - 1996. - No. 12.