A high resolution survey was conducted of surface soil samples at Capulin Volcano National Monument in northeastern New Mexico, USA. Composited grid samples were collected and processed for physicochemical data. Brief site descriptions were made at each sampling location. Several departures from established USDA-NRCS SSURGO soils data were noted. Localized discrepancies in soil texture, slope class, elevation and soil pH were readily apparent in the data. Either the range of characteristics of soils mapped at the monument needs to be expanded, or new soil series should be utilized at the monument to reflect the differences observed.