General Geology

United States Geological Survey
Geological Society of America
California Department of Conservation
Association for Women Geoscientists
U.C. Berkeley Museum of Paleontology
San Joaquin Geological Society
Northern California Geological Society

Geology and Recreation

U.S. National Parks
California State Parks
California Desert Recreation
Bureau of Land Management Recreation
BLM Field Trips
Geocaching Home Site
Earthcaching at Geological Society of America

General Hiking

American Hiking Society
Bay Area Hiker
GORP Hiking

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