Jones Tract, Agricultural island in Sacramento-San Joaquin River Delta, California.

Jones Tract is an agricultural area in the Sacramento-San Joaquin River Delta in California. The region is divided into two sections and bordered by several waterways and sloughs.

The area developed as farmland and has been part of the Delta system since the 1800s. A levee failure in 2004 caused major flooding that required months of repair and drainage work.

The island is managed by Reclamation District 2039, a local agency responsible for its levees and drainage. The Mokelumne Aqueduct, West Lower Jones Road and a former Atchison, Topeka and Santa Fe rail line run in parallel across the two tracts, and the rail corridor now carries BNSF freight and Amtrak California trains.

The BNSF Railway line crosses through the area with regular train service. Visitors should know the region is very flat with extensive waterways, which limits exploration to certain routes.

The entire area lies well below sea level, creating a unique hydrological situation. This geographic factor makes water management and flood protection ongoing challenges for the region.