Bradford Island

{{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.

Franks Tract State Recreation Area (SRA) is a state park unit of California, United States, featuring a flooded area in the Sacramento–San Joaquin River Delta. It is accessible only by water. Franks Tract, and a smaller adjoining submerged property called "Little Franks Tract", are situated between the False River and Bethel Island. The recreation area is used primarily for fishing and waterfowl hunting, because of its exposure to frequent strong winds and fluctuating water levels. In times of high water, the entire site can be submerged except for portions of the old levees. The 3,523-acre (1,426 ha) park was established in 1959. It is managed from nearby Brannan Island State Recreation Area, 6 miles (9.7 km) to the northwest.

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.

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.

Bethel 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 island describes itself as "the heart of the California Delta." Bethel Island (formerly known as Bethell, Bethell Ranch, Bethel Tract, Sand Mound Ranch, Sand Mound Tract) is also a census-designated place (CDP) on the island. The population at the 2010 census was 2,137, a 7.6 percent decline from 2,312 at the 2000 census. The community of Bethel Island is governed as a Special Act District created by the California State legislature and named the Bethel Island Municipal Improvement District (BIMID). It is a popular destination for recreation seekers, especially hunters, fishermen and boaters.

Decker Island is a small island in the Sacramento-San Joaquin River delta, in California. It is part of Solano County. Its coordinates are 38.0904745°N 121.7191214°W / 38.0904745; -121.7191214 (Decker Island).

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.

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.

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.

The Old River is a tidal distributary of the San Joaquin River that flows for about 40 miles (64 km) through the Sacramento–San Joaquin River Delta in Northern California. The Old River was once the main channel of the San Joaquin until navigation (Stockton Deepwater Shipping Channel) and flood control projects in the late 19th and 20th century fixed the San Joaquin to its present course past Stockton. It diverges from the San Joaquin near Tracy, about 38 miles (61 km) upstream from Antioch, and first runs west towards Mountain House, then north to rejoin the San Joaquin 13 miles (21 km) above Antioch. The river is lined with levees that prevent flooding of the adjacent Delta islands, many of which lie below sea level. The Middle River runs east of and roughly parallel to Old River. False River diverges from Old River about a mile (1.6 km) above the Old River's mouth and runs westward to join the San Joaquin at a point closer to Antioch. Part of the Old River forms the boundary between San Joaquin County on the east and Contra Costa County to the west. About halfway along its course the Old River passes by the Clifton Court Forebay, where water is pumped from the Delta to support California's two primary water supply systems, the Central Valley Project and State Water Project. Because both projects derive their sources from the Sacramento River further north, pumping results in a reverse flow in the Old River as water flowing through the Delta Cross Channel is drawn southward through the Delta and up the Old River. (Naturally, the Old River would have flowed in a northerly direction). During dry summers, this often results in saltwater intrusion from San Francisco Bay. The reverse flow also confuses migrating salmon in the San Joaquin River which may have contributed to the decline of the species in the 20th century. Since the 1960s, the California Department of Water Resources has maintained temporary barrier dams to control the flow of water, a system which has improved water quality and circulation. The Head of Old River barrier is routinely installed during spring at the point where the Old River diverges from the San Joaquin, in order to prevent outmigrating young salmon from entering the longer, winding Old River where they are less likely to survive the journey to the sea. A pumping station on Old River east of Discovery Bay provides fresh water to Los Vaqueros Reservoir via pipeline. The Peripheral Canal project, proposed since the 1960s would have bypassed diverted water flows around the Delta and eliminated the reverse flow in the Old River. However, the canal was never built due to environmental concerns for the Delta region. On the right bank, the Old River borders Berts Island, Union Island, Victoria Island, Woodward Island, Bacon Island, and Mandeville Island. On the left it borders Stewart Tract, Coney Island, Widdows Island, Byron Tract, Orwood Tract, Palm Tract, Holland Tract, Little Mandeville Island, Quimby Island, and Webb Tract. The Old River also skirts the Franks Tract State Recreation Area, a former Delta island that is now submerged and forms a lake. The Old River ranges from 5 to 10 feet (1.5 to 3.0 m) deep and from 150 to 1,600 feet (46 to 488 m) wide. The U.S. Geological Survey operates five stream gauges on the Old River. Measured at Bacon Island, the Old River had an average reverse flow of 1,823.6 cubic feet per second (51.64 m3/s) between 2006 and 2014.

Oakley station is a planned station that will be a stop on Amtrak California's San Joaquin service. It is located near Main Street between O'Hara Avenue and 2nd Street. The station was partially funded by a 2018 grant from California's Transit and Intercity Rail Capital Program. Construction was expected to be completed by 2022. As of March 2023, the station is expected to open in the third quarter of 2024, replacing Antioch–Pittsburg station.

Oakley is a city in Contra Costa County, California, United States. It is within the nine-county San Francisco Bay Area. The population at the 2020 United States census was 43,357. Oakley was incorporated in 1999, making it the newest incorporated city in Contra Costa County.