This digital data set defines the boundary of the area contributing ground-water flow to the Death Valley regional ground-water flow-system (DVRFS) model domain. The boundary encompasses an approximate 112,000 square-kilometer region and was based on a map of regional potential developed by Bedinger and Harrill (2004). Where possible, the amount of lateral flow across the segments of the DVRFS model boundary from (or to) the contributing area was estimated from ground-water budgets of hydrologic units in the adjacent subregion (see "Larger Work Citation", Appendix 2). The lateral ground-water flow estimates were used to support development of the transient ground-water model of the DVRFS completed in 2004 by the USGS (see "Larger Work Citation", Chapter F).