Sabine Lake is a 90000 acres (36,421.7 ha) salt water estuary

Estuary

An estuary is a partly enclosed coastal body of water with one or more rivers or streams flowing into it, and with a free connection to the open sea....

 on the Texas-Louisiana border. The lake, some 14 miles (23 km) long and 7 miles (11 km) wide, is formed by the confluence of the Neches River

Neches River

The Neches River flows for through east Texas to its mouth on Sabine Lake near the Rainbow Bridge. Two major reservoirs, Lake Palestine and B. A. Steinhagen Reservoir are located on the Neches. Several cities are located along the Neches River Basin, including Evadale, Tyler, Lufkin, Silsbee,...

 and Sabine River. Through its tidal outlet 5 miles (8 km) long, Sabine Pass

Sabine Pass

Sabine Pass is the natural outlet of Sabine Lake into the Gulf of Mexico. It borders Jefferson County, Texas, and Cameron Parish, Louisiana.Two major battles occurred here during the American Civil War, known as the First and Second Battles of Sabine Pass....

, Sabine Lake drains some 50000 square miles (129,499.4 km²) of Texas and Louisiana into the Gulf of Mexico

Gulf of Mexico

The Gulf of Mexico is a partially landlocked ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. In...

. The lake borders Jefferson County, Texas

Jefferson County, Texas

Jefferson County is a county located in the state of Texas, United States. As of 2000, the population was 252,051. Its county seat is Beaumont, and it is named for the former U.S...

, Orange County, Texas

Orange County, Texas

Orange County is one of 254 counties of the State of Texas and its county seat is the city of Orange, Texas. In the year 2000, the population of Orange County was about 85,000. Orange County is the county in the very southeastern corner of Texas, with a boundary with Louisiana and a seacoast on the...

, and Cameron Parish, Louisiana

Cameron Parish, Louisiana

Cameron Parish is the parish with the most land area in the U.S. state of Louisiana. The parish seat is Cameron and as of 2010, the population was 6,839...

. The City of Port Arthur, Texas

Port Arthur, Texas

-Demographics:As of the 2000 census, there were 57,755 people, 21,839 households, and 14,675 families residing in the city. The population density was 696.5 people per square mile . There were 24,713 housing units at an average density of 298.0 per square mile...

 and City of Groves, Texas

Groves, Texas

Groves is a city in Jefferson County, Texas, United States. The population was 15,733 at the 2000 census. A July 1, 2008 U.S. Census Bureau estimate placed the population at 14,393. It is part of the Beaumont–Port Arthur Metropolitan Statistical Area....

share coastline with the lake.