"Indians of All Tribes, who were occupying the abandoned federal prison island of Alcatraz in San Francisco Bay at the time, sent a delegation to meet with the Pomos on Rattlesnake Island. Here's a description, written by Mohawk poet Peter Blue Cloud, in a little book, Alcatraz Is Not an Island (Wingbow Press, 1972, long out of print):
"The Pomo Indians at Clear Lake are witnessing the destruction of their sacred lake. The waters are no longer clear but murky, as they became polluted from the wastes of the thousands of homes, resorts, and new subdivisions. Gas-powered boats race all over the lake. Bulldozers are eating at the base of sacred Mt. Konoceti to create more housing, mountainsides are being stripped to provide gravel. Neat plots of plastic grass and shrubs are being laid out in a Disneyland nightmare.
"At Sulphur Banks Rancheria, the El-Em Band of Pomos have watched the rape and destruction of their lands since the coming of the whiteman. Very close to their homes is a small lake of sulphur-infested waters left by a mining company. It is a pit hundreds of feet deep which lies above the level of Clear Lake less than 200 feet from the shore [contaminating the lake by seepage]. All around this contaminated water, lies a stripped and barren land, plundered for mercury, to supply two world wars. Very few things grow here.
"A hundred feet offshore from Sulphur Banks is Rattlesnake Island, ancient burial ground and village site of the El-Em Pomo. It is a rocky island, thickly overgrown. It has always been a part of their lands.
"Boise Cascade, the giant lumber and subdivision monster, suddenly appeared on the scene to say Rattlesnake Island was theirs, and that they were going to subdivide it. May 1, 1970, the Pomo Indians moved onto the island and stated their intention to stay."
Story from Pomo People: Brief History