Decker Island

Sherman Island is an island in the Sacramento-San Joaquin River Delta at the confluence of the two rivers in Sacramento County, California, 1.2 miles (1.9 km) northeast of Antioch. The 5,500 ha (14,000 acres) island, mostly managed by Reclamation District 341, is the meeting point of Sacramento, Solano, and Contra Costa Counties, and is bordered on the north and northwest by the Sacramento River, on the northeast by Three Mile Slough, and on the east, and south west by the San Joaquin River. Sherman Island is a widely known kite and windsurfing area. Sherman Island was shown, in the same location but with a different shape, on an 1850 survey map of the San Francisco Bay area made by Cadwalader Ringgold and an 1854 map of the area by Henry Lange. Currently, it is 10 feet below sea level, due to the drainage of wetlands in the Delta which has dried out its peat soils, resulting in land subsidence. "In ... parts of Sherman Island, the land has now subsided 25 feet since the late 1800s—and continues to sink between half an inch and 1.5 inches yearly." It is possible that simultaneous levee failures on Sherman Island and surrounding islands, occurring in the wake of an earthquake, could threaten the fresh water supply for the Central Valley.

Brannan Island State Recreation Area is a state park unit of California, United States, preserving a maze of waterways in the Sacramento–San Joaquin River Delta. The recreation area is located in Sacramento County between Rio Vista and Isleton. This park northeast of San Francisco Bay has countless islands and marshes with many wildlife habitats and many opportunities for recreation, including boating, windsurfing and swimming. The 329-acre (133 ha) park was established in 1952.The area offers fishing, including striped bass, sturgeon, catfish, bluegill, perch and bullhead. Southeast, accessed by the San Joaquin River, Frank’s Tract, a protected wetland marsh, is home to beaver, muskrat, river otter, mink and 76 species of birds. Another wetland also managed by Brannan Island's Park Rangers is Delta Meadows River Park near the town of Locke. Canoe tours of 'the meadows' may be reserved on weekends during the spring and fall season through Brannan Island SRA.Brannan Island SRA has a six-lane launch ramp, over 140 campsites and areas for picnicking and swimming. The visitor center is open weekends and by arrangement. Inside are displays on the cultural and natural history of the Delta, including a large interactive map of the San Francisco Bay Area and Delta. Day use areas include the Windy Cove windsurfing access, the group picnic area located at the Ramadas, and Seven Mile Slough picnic area. The group picnic facility and Seven Mile Slough day use area close at sunset. Windy Cove closes at the hour posted at the entrance road to Windy Cove. Seven Mile Slough picnic area includes picnic tables, barbecues and drinking water. New restroom facilities were completed late in 1997 and include flush toilets and outdoor cold showers. Seven Mile Slough's swim beach has lifeguards from Memorial Day through Labor Day. Ample parking is close to the beach. The Ramadas have shaded picnic structures with large barbecues, picnic tables, water and trash receptacles. A large open grassy area is adjacent to the site for games. The closest restroom to the Ramadas is located north of the swim beach along Seven Mile Slough. The climate in the Delta is mild, with winter temperatures usually ranging between 45 and 55 degrees and summer temperatures between 75 and 95. An occasional heat wave will push the temperatures in summer to 100 degrees or more but the Delta breeze is never far away. The park was closed starting April 1, 2022, while California State Parks sought a new operator. The park was partially reopened from June to September, 2022, and fully reopened December 1, 2022, operated by Park Delta Bay, a nearby resort.

The Sacramento Deep Water Ship Channel (also known as Sacramento River Deep Water Ship Channel or SRDWSC) is a canal from the Port of Sacramento in West Sacramento, California, to the Sacramento River, which flows into San Francisco Bay. It was completed by the United States Army Corps of Engineers in 1963. The channel is about 30 feet (9.1 m) deep, 200 feet (61 m) wide, and 43 miles (69 km) long. The Port of Sacramento is a significant port on the West Coast of the United States, but receives far less traffic than larger ports. It handles primarily agricultural products and other bulk goods rather than containers, which dominate the shipping market. A plan to dredge the channel to 35 feet (11 m) became stalled in 1990 because the Port of Sacramento was unable to finance its share of the cost. Nonetheless, there is still interest in the project.The channel has one set of ships locks—the William B. Stone Sacramento Locks—located at the eastern terminus of the channel, where it meets the Sacramento River. These locks were decommissioned in the mid 1980s and de-authorized in 2000. While the locks were reactivated for a fish passage study in 2003 and 2004, they are currently non-operational.

Bradford Island is a 2,172-acre (879 ha) island of the Sacramento–San Joaquin River Delta, in Contra Costa County, California, United States. Bradford Island is inaccessible by roads, and is served by a ferry across the False River from nearby Jersey Island. Approximately 48 people lived on the island as of 2020; other uses of land include wheat farming, cattle grazing, and natural gas extraction. Bradford Island is a reclaimed peat wetland; as it lies below sea level, it is protected by flooding by levees. These, as well as a pump station and internal drainage canals, are administered by Reclamation District 2059, founded in 1921. The levees have been breached on several occasions, leading to the island becoming flooded. Bradford Island is one of eight Delta islands considered critical to the region's water quality by the California Department of Water Resources.

Jersey Island is an island in the Sacramento-San Joaquin River Delta of Contra Costa County, California, approximately 10 kilometres (6.2 mi) east of Antioch. The 1,425-hectare (3,520-acre) bounded on the west by the San Joaquin River-Stockton Deepwater Shipping Channel, on the north by the False River, on the northeast by Piper Slough, on the east by Taylor Slough, and on the south by Dutch Slough. It is administered by Reclamation District 830.

The Antioch Bridge (officially the Senator John A. Nejedly Bridge) is an automobile, bicycle, and pedestrian bridge in the western United States. Located in northern California, it crosses the San Joaquin River-Stockton Deepwater Shipping Channel, linking Antioch in Contra Costa County with Sherman Island in southern Sacramento County, near Rio Vista. Named after state senator John Nejedly, the bridge is signed as part of State Route 160. Unlike other toll bridges in California, it has only a single lane of traffic for each direction. It is one of several bridges in the Bay area that are traversable by pedestrians and bicyclists in addition to automobiles. The current bridge was completed 46 years ago in 1978, is 1.8 miles (2.9 km) in length, and opened to traffic that December.

Antioch/Oakley Regional Shoreline is a regional park that is part of the East Bay Regional Parks system. It is located on the south shore of the San Joaquin River in Contra Costa County, California, between the cities of Antioch and Oakley. It is owned by the State of California and operated on a no-cost lease by the East Bay Regional Parks District. The park was begun in 1979, when the adjacent John Nejedly Bridge (a.k.a. Antioch Bridge) was constructed across the river. The park was originally named Antioch Regional Shoreline, and was given its present name when Oakley incorporated as a city in 1999.

Big Break Regional Shoreline is a regional park in Oakley, Contra Costa County, northern California. It is a part of the East Bay Regional Park District system.

Gateway Generating Station (GGS), formerly Contra Costa Unit 8 Power Project, is a combined-cycle, natural-gas-fired power station in Contra Costa County, California, which provides power to half a million customers in northern and central California. Gateway Generating Station is on the southern shore of the San Joaquin River, in Antioch, and is one of more than ten fossil-fuel power plants in Contra Costa County. Construction, which cost $386 million, began in 2001; the station began delivering power to customers in 2009. Its nominal capacity is 530 MW, with a peak capacity of 580 MW. It generates electricity using two combustion turbines, paired with heat recovery steam generators (HRSGs) that power one steam turbine. The facility is owned and operated by Pacific Gas and Electric Company (PG&E). In June 2015, a lawsuit was filed against the Environmental Protection Agency to prevent the approval of the station's air-emissions permit; the suit was dismissed in October of that year. As of 2015, the only recorded injury that had ever occurred at the facility was in April 2009, when an employee tripped and chipped a tooth.

{{Merger with Franks Tract State Recreation Area has been proposed. Please see Talk page.}} The Antioch Bombing Target a 500-acre (200 ha) plot was a United States Navy target used from 1943 to 1952. It is now part of the Franks Tract State Recreation Area.

Marsh Creek is a stream in east Contra Costa County, California in Northern California which rises on the eastern side of Mount Diablo and flows 30 miles (48 km) to the Sacramento–San Joaquin River Delta at Oakley, California, near Big Break Regional Shoreline. The creek flows through Marsh Creek State Park (California), where water is impounded to form Marsh Creek Reservoir, then through the city of Brentwood, California.

The Montezuma Hills comprise a small range of low-elevation hills at the northern banks of the Sacramento–San Joaquin River Delta and southwestern Sacramento Valley in California in the United States.