Soda Lake is a dry lake

Dry lake

Dry lakes are ephemeral lakebeds, or a remnant of an endorheic lake. Such flats consist of fine-grained sediments infused with alkali salts. Dry lakes are also referred to as alkali flats, sabkhas, playas or mud flats...

 at the terminus of the Mojave River

Mojave River

The Mojave River is an intermittent river in the eastern San Bernardino Mountains and Mojave Desert in San Bernardino County, California. The river is notable as most of its flow is underground, while its surface channels remain dry most of the time, with the exception of the headwaters and several...

 in the Mojave Desert

Mojave Desert

The Mojave Desert occupies a significant portion of southeastern California and smaller parts of central California, southern Nevada, southwestern Utah and northwestern Arizona, in the United States...

 of San Bernardino County, California

San Bernardino County, California

San Bernardino County is a county in the U.S. state of California. As of the 2010 census, the population was 2,035,210, up from 1,709,434 as of the 2000 census...

. The lake has standing water during wet periods, and water can be found beneath the surface.

Soda Lake along with Silver Lake

Silver Lake (Mojave)

Silver Lake is a dry lake bed in the Mojave Desert of San Bernardino County, California, along Interstate 15, northeast of Barstow.-History:...

 are what remains of the large, perennial, Holocene

Holocene

The Holocene is a geological epoch which began at the end of the Pleistocene and continues to the present. The Holocene is part of the Quaternary period. Its name comes from the Greek words and , meaning "entirely recent"...

 Lake Mojave

Lake Mojave

Lake Mojave is an ancient former lake fed by the Mojave River that, through the Holocene, occupied the Silver Lake and Soda Lake basins in the Mojave Desert of San Bernardino County, California. Its outlet ultimately emptied into the Colorado River north of Blythe....

. The waters of the lake, now with no outlet, evaporate

Evaporation

Evaporation is a type of vaporization of a liquid that occurs only on the surface of a liquid. The other type of vaporization is boiling, which, instead, occurs on the entire mass of the liquid....

 and has left alkaline evaporite

Evaporite

Evaporite is a name for a water-soluble mineral sediment that result from concentration and crystallization by evaporation from an aqueous solution. There are two types of evaporate deposits, marine which can also be described as ocean deposits, and non-marine which are found in standing bodies of...

s of sodium carbonate

Sodium carbonate

Sodium carbonate , Na2CO3 is a sodium salt of carbonic acid. It most commonly occurs as a crystalline heptahydrate, which readily effloresces to form a white powder, the monohydrate. Sodium carbonate is domestically well-known for its everyday use as a water softener. It can be extracted from the...

 and sodium bicarbonate

Sodium bicarbonate

Sodium bicarbonate or sodium hydrogen carbonate is the chemical compound with the formula Na HCO3. Sodium bicarbonate is a white solid that is crystalline but often appears as a fine powder. It has a slightly salty, alkaline taste resembling that of washing soda . The natural mineral form is...

.

Soda Lake is located on the southern side of Interstate 15

Interstate 15 in California

In the U.S. state of California, Interstate 15 is a major north–south route through the San Bernardino, Riverside, and San Diego Counties, and it has a length of in the state. It is a major thoroughfare for traffic between Southern California and Las Vegas, Nevada, as well as points beyond...

, and can be seen at the Zzyzx Road

Zzyzx, California

Zzyzx, California , formerly Camp Soda and Soda Springs, is a settlement in San Bernardino County, California. It is the former site of the Zzyzx Mineral Springs and Health Spa and now the site of the Desert Studies Center...

 interchange and the Oat Ditch bridge, as well as the Soda Lake bridge (signed as the Mojave River) looking south from Baker

Baker, California

Baker is a census-designated place located in San Bernardino County, California, USA. As of the 2010 census, the town had a total population of 735.Baker was founded as a station on the Tonopah and Tidewater Railroad in 1908,...

.