The Subglacial Antarctic Lakes Scientific Access (SALSA) project is an integrative study of subglacial geobiology, water column and sedimentary organic carbon, and geological processes in Mercer Subglacial Lake, a hydrologically active subglacial lake beneath the Whillans and Mercer ice streams in West Antarctica. The project was funded in 2016 by the Antarctic Integrated System Science Program with the National Science Foundation’s Office of Polar Programs. There are eleven principal investigators at eight different US institutions with additional US and international collaborators. Antarctic field work began in the austral summer of 2016/2017 and will continue through the 2019/2020 season.