ModelMuse is a graphical user interface (GUI) for the U.S. Geological Survey (USGS) models MODFLOW 6, MODFLOW–2005, MODFLOW-LGR, MODFLOW-LGR2, MODFLOW-NWT, MODFLOW-CFP, MODFLOW-OWHM versions 1 and 2, MODPATH, ZONEBUDGET, PHAST, SUTRA 2.2, SUTRA 3.0, SUTRA 4.0, MT3D-USGS, and WellFootprint and the non-USGS programs MT3DMS and PEST.