The directed movement of lactate into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Lactate is 2-hydroxypropanoate, CH3-CHOH-COOH; L(+)-lactate is formed by anaerobic glycolysis in animal tissues, and DL-lactate is found in sour milk, molasses and certain fruit juices.
lactate transport