There are quite a few listings available at http://www.modoccountygenealogy.com/alturascemetary.htm part of The CaGenWeb Project. There is also a Pioneer Cemetery listing here: http://www.modoccountygenealogy.com/alturaspioneercemetary.h... and an Indian Cemetery here: http://www.modoccountygenealogy.com/alturasindiancemetary.ht...
Hope this helps!
Julie Appletoft
Modoc County CaGenWeb Coordinator
http://www.modoccountygenealogy.com/