The Lake Houston watershed is located northwest of Jackson Bayou watershed and north of the Lower San Jacinto River watershed. The East and West Forks of the San Jacinto River and the San Jacinto River are the primary streams that flow through the watershed before the San Jacinto River flows into the Lower San Jacinto River watershed.
Lake Houston is a 12,240-acre reservoir constructed on the San Jacinto River. It has a drainage area of approximately 2,600 square miles. This watershed has sedimentation issues that the Texas Parks and Wildlife (TPWD), the City of Houston, the San Jacinto River Authority (SJRA), Texas A&M University, the U.S. Army Corps of Engineers are trying to address in a cooperative project.