Miramar, Half Moon Bay, California

Arroyo de en Medio (Spanish for "in the middle creek") is a 2.5-mile-long (4.0 km) coastal stream in western San Mateo County, California. Arroyo de en Medio rises on the western slopes of Montara Mountain and discharges to the Pacific Ocean at Half Moon Bay at the location of the unincorporated community of Miramar at Miramar Beach. The watershed of Arroyo de en Medio consists of relatively permeable sandy soils capable of significant recharge to its aquifers, which supply considerable potable water to the local area. Arroyo is Spanish for creek; de en Medio means literally "of in between" but a closer more functional translation may be in the middle.

Miramar Beach is a sandy beach in western San Mateo County, California. Miramar Beach is one of the numerous beaches on Half Moon Bay, a Pacific Ocean embayment noted for its surfing and extensive visitation. The marine terrace above the beach itself is situated approximately eight meters above mean sea level, and on this terrace is positioned the small unincorporated community of Miramar, which is a residential setting that also has several coastal visitor serving uses such as restaurant and lodging facilities. A stream named Arroyo de en Medio discharges onto Miramar Beach into the Pacific Ocean. Access to Miramar beach from State Route 1 requires a turn west on Magellan Avenue, then left on Mirada Road. A public trail lies along the blufftop spanning three miles of coastline from Miramar to the city of Half Moon Bay; this trail affords sweeping marine views and good birdwatching.

Naples Creek is a stream in San Mateo County, California, United States that rises on the western slopes of the Santa Cruz Mountains and discharges to the Pacific Ocean. The specific point of discharge is onto Naples Beach, a unit of the Half Moon Bay State Beach. This watercourse runs through the city of Half Moon Bay, which municipality has planning jurisdiction over the creekside area within its city boundaries. In the Open Space Element of Half Moon Bay's General Plan, Naples Creek is designated to have significant wetland and riparian zone biotic resources.The city of Half Moon Bay is proposing a trail along Naples Creek to expand on the recreational use of this natural resource. The area near the Mouth of Naples Creek is already in public ownership and is traversed by the coastside public trail along the low-lying blufftop. Further upstream along the banks of Naples Creek, the lower reach banks are in public ownership as within the right-of-way of Guerrero Avenue resources. The city recognizes the entire riparian area as an important open space resource and is considering re-zoning to open space the entire passage of the stream through the Half Moon Bay.

Frenchmans Creek is a 4.4-mile-long (7.1 km) stream in San Mateo County, California. Locks Creek is its largest tributary.

Half Moon Bay is a bay of the Pacific Ocean on the coast of San Mateo County, California. The bay is approximately semi-circular, hence the name half moon, with sea access to the south. Coastal towns located there are Princeton-by-the-Sea, Miramar, El Granada, and the city of Half Moon Bay. The surfing location Mavericks is located on the outer edge of the peninsula which forms the bay. Miramar Beach is located along the shore of the bay opposite the peninsula. Marine species include flatfish, the commercially important English sole, rockfish, surfperch, Pacific herring, lingcod; and abundant winter species including starry flounder and top-smelt.The bay provides an example of a logarithmic spiral beach.

Pilarcitos Creek (Spanish for: Little Pillars or Pillaries Creek) is a 13.5-mile-long (21.7 km) coastal stream in San Mateo County, California, United States, that rises on the western slopes of the Santa Cruz Mountains and descends through Pilarcitos Canyon to discharge into the Pacific Ocean Half Moon Bay State Beach. The Pilarcitos Creek watershed is a significant area of ecological, cultural and economic diversity. It is a source of clean drinking water for residents of the central coast and San Francisco Bay Area and supports several natural-resource based economies – including agriculture and recreational tourism. The watershed is also experiencing increased competition for water between agricultural, domestic, recreational, commercial and environmental uses.

El Granada is a village and census-designated place (CDP) in the coastal area of northern San Mateo County, California, United States. The population was 5,481 at the 2020 census. The village is named for the city of Granada, Spain.

Half Moon Bay State Beach is a 4-mile (6 km) stretch of protected beaches in the state park system of California, United States, on Half Moon Bay. From north to south it comprises Roosevelt, Dunes, Venice, and Francis Beaches. The 181-acre (73 ha) park was established in 1956.

Princeton-by-the-Sea (sometimes, especially locally, called Princeton) is an unincorporated community on the coast of San Mateo County, California. The ZIP code is 94019 and the community is in area code 650.

Pillar Point Harbor is a boat harbor created by a riprap breakwater in San Mateo County, California, immediately north of Half Moon Bay. It is used by both pleasure craft and small commercial fishing boats. The Ohlone people inhabited the region into much of the 19th century, and a number of recorded shipwrecks occurred in the immediate area. The modern harbor facilities were constructed between 1959 and 1982. The harbor facilities are managed by the San Mateo County Harbor District.

Denniston Creek is a 4.4-mile-long (7.1 km) coastal stream in western San Mateo County, California. Denniston Creek rises on the western slopes of Montara Mountain and discharges to the Pacific Ocean at Pillar Point Harbor somewhat north of El Granada Beach. The watershed of Denniston Creek is made up of relatively permeable sandy soils capable of significant recharge to its aquifers, which supply a moderate amount of potable water to the local area.

Locks Creek is a 1.9-mile-long (3.1 km) stream in San Mateo County, California. It is the largest tributary of Frenchmans Creek, a larger stream.