Novato Creek

Day Island is an island at the mouth of the Petaluma River in San Pablo Bay (an embayment of San Francisco Bay). It is part of Marin County, California. Its coordinates are 38°06′13″N 122°29′26″W, and the United States Geological Survey measured its elevation as 105 ft (32 m) in 1981. It appears on a 1951 USGS map of the area, although it appears on maps from as old as 1873. The "1880 History of Marin County" by Alley, Bowen and Co. mentions "a man by name of Day" who "settled on an island in Novato township which has since borne his name" in 1851." To this day, there are still 2 houses on the island, both inhabited. The island is bordered by dirt and two lagoons to the west, and marshlands to the east, although it was once entirely surrounded by either marshland or water.

The Petaluma River is a river in the California counties of Sonoma and Marin that becomes a tidal slough for most of its length. The headwaters are in the area southwest of Cotati. The flow is generally southward through Petaluma's old town, where the waterway becomes navigable, and then flows another 10 mi (16 km) through tidal marshes before emptying into the northwest corner of San Pablo Bay.

The Vince Mulroy Memorial Woodland and Wildlife Preserve, formerly known as the Black Point Nature Preserve, is a 64-acre parcel of public land in Novato, California with various hiking trails. The preserve is also partially on the site of the former Renaissance Pleasure Faire, which took place there from 1971 until 1998. When the faire went bankrupt, Vince Mulroy bought the land and donated part of it to become the preserve, with the other part becoming the Stonetree Golf Club. In 2009, the preserve changed names from the Black Point Nature Preserve to the Vince Mulroy Memorial Woodland and Wildlife Preserve. The preserve is known locally for its large variety of birds, which makes the area a popular place for local birdspotters.

Black Point-Green Point is a census-designated place (CDP) in Marin County, California, United States. It is unincorporated, sitting between the city of Novato to the southwest and the Petaluma River and San Pablo Bay to the northeast. The population was 1,431 at the 2020 census.

The Black Point Railroad Bridge is a truss swing bridge spanning the Petaluma River, located in Black Point-Green Point, California.

The Black Point Communications Annex was an antenna array and off-site radio communications annex located in Novato, California, 1.5 miles from Black Point, from which it gained its name. It is located 4 miles north of Hamilton Field, a position that was chosen due to its close proximity to a major air force hub. Due to the property having been privately owned, the federal government had to use eminent domain twice to acquire the land, first in 1939 and again in 1957 in order to expand the array. In 1952, both the Hamilton Air Force Base and the Black Point Communications Annex were declared "Permanent Installations" by the United States Air Force, but their usefulness had already begun to decline, and on January 11, 1976, the General Services Administration (GSA) was placed in charge. Eight years later, they sold the former Black Point Communication Annex to the State of California. Many of the buildings are still intact, such as an electrical power station, 2 transmitting building/control rooms, a generator room, and most of the antennae. Some of the other buildings that were built out of wood or corrugated steel are reduced to foundations. The land on which the array is located is overgrown, and visibly different from the fields and pastures that surround it.

Bel Marin Keys is an unincorporated community in Marin County, California. It lies at an elevation of 10 feet (3 m).

The Hamilton Wetland Restoration Project, now known as the Hamilton/Bel Marin Keys Wetlands Restoration, is a wetlands habitat restoration project at the former Hamilton Air Force Base—Hamilton Army Airfield (1930−1988) site and adjacent Bel Marin Keys shoreline, in Marin County, California. It is located at Whiteside Marsh on the northwestern shore of San Pablo Bay, in and adjacent to the city of Novato in the North Bay region of the San Francisco Bay Area.

Whiteside Marsh is a coastal estuary marsh and wetlands on the northwestern shore of San Pablo Bay in northern Marin County, California. It is in and adjacent to the city of Novato and the Bel Marin Keys community, in the North Bay region of the San Francisco Bay Area.

Hamilton Field (Hamilton AFB) was a United States Air Force base, which was inactivated in 1973, decommissioned in 1974, and put into a caretaker status with the Air Force Reserves until 1976. It was transferred to the United States Army in 1983 and was designated an Army Airfield until its BRAC closure in 1988. It is located along the western shore of San Pablo Bay in the southern portion of Novato, in Marin County, California.

Tolay Creek is a 12.5-mile-long (20.1 km) southward-flowing stream in southern Sonoma County, California, United States, which flows through Tolay Lake and ends in north San Pablo Bay.

Columbia Pacific University (CPU) was a distance learning school in California. It was founded in 1978 and closed by California court order in 2000.