About
Who we are
HOSTING GREAT FIELD TRIPS SINCE 1972! 2022 WAS OUR 50th ANNIVERSARY!
The Cooperative Field Trip Chairmen's Association ("CO-OP") was established in 1972. It currently has 10 Member Clubs located in Northern California. The CO-OP is a member of the California Federation of Mineralogical Societies (CFMS)
Each society hosts one or more field trips a year. Our annual seminar is in March with an educational speaker and a luncheon. We have a live auction with donated rocks, minerals and unrelated items. This is our main fund raiser.
The CO-OP elects officers annually. There are also Permanent Directors, Associate Directors, and Honorary Directors.
The CO-OP has a Field Trip Coordinator, Historian, and Webmaster.
The CO-OP meets on a quarterly basis.
SPONSORING CLUBS
Calaveras Gem & Mineral Society
P.O. Box 517
Angels Camp, CA 95222
3rd Sunday, 12:00 noon (except July & August)
CGMS Club House
2500 Mecham Ranch Road
Angels Camp, CA
2nd Monday, 6:30 p.m. Endeavor Hall,
6008 Center Street
Clayton CA 94517
El Dorado County Mineral & Gem Society
P.O. Box 950
Placerville, CA 95667
3rd Thursday, 7:00 p.m.
American Legion Hall
4561 Greenstone Road
Placerville, CA 95667
Fossils For Fun Society
3600 Jackie Ct. Shingle Springs, CA 95682
2nd Thursday, 7:00 p.m. (except July, Aug. & Dec.)
Woman’s Thursday Club Bldg.
10625 Fair Oaks Boulevard
Fair Oaks, CA 95628
1st Sunday, 2:00 p.m.
Tuolumne River Lodge
2429 River Rd., Modesto, CA 95351
1st Tuesday, 7:00 p.m.
Golden Empire Grange
11363 Grange Court
Grass Valley, CA 95945
2nd Tuesday, 7:00 p.m.
Garden Room, @The Grounds (Placer Co Fairgrounds)
800 All America City Boulevard
Roseville, CA 95678
Sacramento Mineral Society
Mailing Address: 5467 Ballantine Street #6
Sacramento, CA 95826
3rd Thursday, 7:00 p.m.
4145 Branch Center Road
Sacramento, CA 95827
Santa Clara Valley Gem and Mineral Society
P.O. Box 54
San Jose, CA 95103-0054
4th Tuesday, 7:30 p.m.
100 Belwood Gateway (the Cabana Club)
Los Gatos, CA 95032
2nd Saturday 1:00 pm
3136 E. Anita Street
Stockton, CA 95205