Chacon Creek is a small stream of water located in Webb County, Texas which runs through Laredo, Texas. The creek is formed 6 miles from Webb, Texas and runs southwest for 20 miles until the creek connects to the Rio Grande. Chacon was dammed in 1951 in east Laredo to form Lake Casa Blanca, a 1,680 acres (6.8 km²) lake. The terrain surrounding the creek is mostly clay. The vegetation surrounding the creek is mostly made up of mesquite, cacti, and grasses.