ARC Data Online: http://www.arcdataonline.com/
ArcData Online is ESRI's Internet Mapping and Data Site. The site contains a wide range of geographic information that users can access to create map images and download data.
Columbia Ecosystem: http://www.icbemp.gov/spatial/metadata/phys/phys.html
ESRI Virtual Campus:
ESRI's virtual campus. They have some valuable free GIS tutorials and it only takes a moment to set up a free account.
Systems at Boise State University: http://earth.boisestate.edu/gis/
Homepage for BSU's GIS center offering resources in training, teaching, research & development, and the promotion of partnerships.
FAQ Page: http://www.census.gov/ftp/pub/geo/www/faq-index.html
Assorted, interesting information about GIS.
Idaho Geographic Information Center: http://www.idwr.state.id.us/gisdata/gis.htm
Idaho State University
Geographic Information Systems Center: http://giscenter.isu.edu/
Homepage for ISU's GIS center offering resources in training, teaching, research & development, and the promotion of partnerships.
Montana Natural Resource
Information System: http://nris.state.mt.us/
Montana's NRIS program is a GIS based state office that manages a variety of natural resource data.
US Environmental Protection
Agency (EPA): http://www.epa.gov/nsdi/index.html
Access to GIS Spatial Data Sites at federal, state and local levels by different environmental subjects.
USGS GIS Information
Useful information for understanding the applicability and functionality of GIS.
University of Idaho GAP Analysis: http://www.wildlife.uidaho.edu/idgap.htm
University of Idaho "Inside": http://inside.uidaho.edu/