Over 195 surficial geology maps have been compiled by the Yukon Geological Survey (YGS) into a standardized GIS format. The maps provide approximately 80% coverage of the territory at scales ranging between 1:250,000 and 1:10,000, with some overlap between scales. Source maps were originally produced by a variety of agencies, including: the Geological Survey of Canada (GSC) (112), Yukon Geological Survey (48), Yukon Government (12), universities (2) and the City of Whitehorse (1). 22 of these maps were previously unpublished. A complete list of map sources included in the compilation is found at the end of this document. While all original feature descriptions have been preserved in the compilation, they have also been converted to standardized values following the Yukon terrain classification system (based on the British Columbia terrain classification system with minor modifications; see section below). The compilation consists of 4 Geographic Information System (GIS) datasets and supporting documents, all of which are available for download by searching for “surficial compilation” on the YGS integrated data system (YGSIDS) or by accessing GeoYukon. Territory-wide point, line and polygon GIS datasets are available in ESRI geodatabase (v10), shapefile and Google Earth (kmz) formats. There is a .lyr file supplied to both symbolize the feature classes and differentiate between overlapping maps at different scales. One additional dataset is a surficial geology map index.Polygon attributes captured include: surficial material, texture, age, surface expression and geomorphological processes. Line features captured include: surficial geological contacts; glacial limits; glacial landforms such as cirques, arêtes, eskers, meltwater channels and moraines; and non-glacial landforms such as faults, lineaments, landslides, and escarpments. Point features captured include: field station, fossil and sample locations; glacial landforms such as erratics, kames, kettles, drumlins and flutings; permafrost features such as pingos, palsas, patterned ground and thermokarst depressions; and other non-glacial landforms such as landslides and tors.These data are a valuable resource for a variety of land-use applications in the territory, including: mineral and placer exploration, geotechnical engineering, infrastructure planning, granular resource assessments, permafrost modeling, agricultural assessments, forest management and biophysical or ecological land classification.