The Armand Bayou watershed is located in southeast Harris County and encompasses portions of the cities of Houston, Pasadena, Deer Park, La Porte and Taylor Lake Village. Armand Bayou flows in a southward direction from its headwaters near Deer Park to its mouth at Clear Lake. Development is heavy in the upper and southwestern regions, while the mid to lower regions are sparsely developed. Several parks and a nature preserve are located along the lower third of the channel. Due to the close proximity to Johnson Space Center, Houston Ship Channel and the Clear Lake area, urbanization is expected to rapidly continue in the near future.
The watershed hosts the 2,000-acre Armand Bayou Park and Nature Center at its mouth.