Salt Creek (Orange County)
Salt Creek is a small coastal stream in southern Orange County, California. It is about 4 miles long and drains roughly 6 square miles in the cities of Laguna Niguel and Dana Point. The creek begins in Laguna Niguel, flows west and then south through a narrow canyon, and empties into the Pacific Ocean at Salt Creek Beach in Dana Point.
Historically, Salt Creek started in the southern San Joaquin Hills near where Golden Lantern and Marina Hills Drive meet. Much of the upper part has been filled in by development, so today water travels through underground pipes for much of its course. A natural channel remains in the Salt Corridor Regional Park, and the Salt Creek Trail runs alongside the creek to the mouth. The lower tributary from San Juan Canyon joins Salt Creek before it goes under Pacific Coast Highway and into the ocean.
The Salt Creek watershed is among the smaller county watersheds, located east of Aliso Creek and west of San Juan Creek. It is about 6 square miles, mostly in Laguna Niguel with a portion in Dana Point. The area lies in the southern San Joaquin Hills, shaped by tectonic uplift about 1.2 million years ago. Today, much of the area’s water is carried by storm drains and channels, since the natural source has been largely developed.
Long before development, the area was inhabited by the Acjachemen (Juaneño) Native Americans. The name Salt Creek has historical roots; on an 1858 map it was shown as Cañada Salada (Salt Canyon) or Cañada Niguel.
From the 1960s to the 1990s, development filled much of the Salt Creek watershed. The lower part of the original canyon was filled to make room for housing and the Pacific Coast Highway. Now the Salt Creek Channel carries water through a man-made path, and the Salt Creek Trail runs beside it.
Pollution is a concern because the creek’s dry-season flow comes mostly from urban runoff, carrying pollutants to nearby beaches like Salt Creek Beach and Monarch Beach. In 2007, runoff was estimated at 500–900 gallons per minute. Laguna Niguel and Dana Point have taken steps to reduce pollution, including restoring streams and wetlands, installing drain filters, and cutting irrigation runoff.
In 2004 Dana Point opened the Salt Creek Ozone Treatment Plant near the ocean outlet. The plant treats runoff to lower bacteria levels and can handle about 1,000 gallons per minute. It now operates year-round, except during very large storms.
The Orange County Public Works department manages the storm drains and the Salt Creek Channel, which starts around Chapparosa Park in Laguna Niguel. The Arroyo Salada Storm Channel and the Niguel Shores storm drain are important tributaries.
This page was last edited on 3 February 2026, at 18:12 (CET).