Big Cypress Creek is an 86 miles (138.4 km) river in Texas

Texas

Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

. It is part of the Red River watershed, with its water eventually flowing to the Mississippi River

Mississippi River

The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...

 and ultimately 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...

.

It rises in southeastern Franklin County

Franklin County, Texas

As of the census of 2000, there were 9,458 people, 3,754 households, and 2,732 families residing in the county. The population density was 33 people per square mile . There were 5,132 housing units at an average density of 18 per square mile...

, 7 miles (11 km) northwest of Winnsboro

Winnsboro, Texas

Winnsboro is a city in Franklin and Wood Counties in the U.S. state of Texas, located 40 miles north of Tyler. The population was 3,584 at the 2000 census...

, and flows generally east, becoming the boundary between Titus

Titus County, Texas

As of the census of 2000, there were 28,118 people, 9,552 households, and 7,154 families residing in the county. The population density was 68 people per square mile . There were 10,675 housing units at an average density of 26 per square mile...

 and Camp

Camp County, Texas

As of the census of 2000, there were 11,549 people, 4,336 households, and 3,156 families residing in the county. The population density was 58 people per square mile . There were 5,228 housing units at an average density of 26 per square mile...

 counties. It turns south and becomes impounded as the Lake O' the Pines

Lake O' the Pines

Lake O’ the Pines is a reservoir on Big Cypress Bayou, also known as Big Cypress Creek, chiefly in Marion County, Texas, USA. The reservoir also occupies a small part of Upshur and Morris Counties...

, which occupies the lowest 20 miles (32.2 km) of the stream's course, primarily in Marion County

Marion County, Texas

As of the census of 2000, there were 10,941 people, 4,610 households, and 3,120 families residing in the county. The population density was 29 people per square mile . There were 6,384 housing units at an average density of 17 per square mile...

. Below the reservoir, the creek becomes known as Big Cypress Bayou, which continues east to Caddo Lake

Caddo Lake

Caddo Lake is a lake and wetland located on the border between Texas and Louisiana, in northern Harrison County and southern Marion County in Texas and western Caddo Parish in Louisiana. The lake is named after the Southeastern culture of Native Americans called Caddoans or Caddo, who lived in...

 and into Louisiana

Louisiana

Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...

.