Butte County Association of Governments (BCAG)
http://www.bcag.org/

CA Environmental Resources Evaluation System (CERES)
http://ceres.ca.gov/geo_area/counties/Butte/

CA Spatial Info Library (CaSIL-Data formerly distributed by TEALE)
http://www.gis.ca.gov/

CA Digital Conservation Atlas
http://www.legacy.ca.gov/new_atlas.epl

CA Dept of Forestry and Fire Protection
http://www.frap.cdf.ca.gov/data/frapgisdata/select.asp

Environmental Systems Research Institute (ESRI) Guide to GIS
http://www.gis.com/

Public Land Survey System of the United States
http://www.geocommunicator.gov/lsi/

GIS Data Links for Northern CA
http://www.pacificsites.com/~cbrooks/gis1.shtml

US Census Quick Facts on Butte County
http://quickfacts.census.gov/qfd/states/06/06007.html

US Census Online Mapping Resources
http://www.census.gov/geo/www/maps/CP_OnlineMapping.htm

Geodata.gov U.S. Maps & Data
http://www.geodata.gov/gos

U.S. Geological Survey (USGS)
http://www.usgs.gov/