Mill Creek

photo banner of different intertidal species

Mill Creek Long-Term trends

Mill Creek Biodiversity Survey findings

Mill Creek is located in the Central Coast region of California, within the Monterey Bay National Marine Sanctuary. This site is only accessible by boat or from land at low tides in order to get around a couple of points. This site receives low visitation by fisherman and tidepoolers. This moderately sloping site consists of moderately uneven terrain, containing few cracks and folds.

overview of research site

Mill Creek is dominated by consolidated bedrock, and the area surrounding the site is comprised of a mixture of consolidated bedrock, boulder fields, and cobble beach. The primary coastal orientation of this site is west.

Long-Term Monitoring Surveys at Mill Creek were established in 1999, and are done by University of California Santa Cruz. Long-Term MARINe surveys currently target the following species: Chthamalus/Balanus (Acorn Barnacles), Mytilus (California Mussel), Silvetia (Golden Rockweed), Endocladia (Turfweed), Mastocarpus (Turkish Washcloth), Phyllospadix (Surfgrass), and Pisaster (Ochre Star).In addition, motile invertebrates, barnacle recruitment, mussel size structure, and water temperature are monitored at this site. For more information see the Long-Term trends at this site.

closeup of research site

Biodiversity Surveys were done in 2001, 2003, 2004, 2017, and 2020. The Biodiversity Survey grid encompasses one section that is approximately 30 meters (along shore) x 20 meters (seaward). For more information see the Biodiversity Survey findings at this site.

For more information about Mill Creek , please contact Pete Raimondi (raimondi@ucsc.edu).

Last modified: Jul 24, 2025