Siskiyou County Museum (Yreka)
Sisson Museum (Mt. Shasta City)
Etna Museum
Lumberman Historical Museum (Weed)
Tulelake Museum
Butte Valley Museum (Dorris)
Karuk Museum and Cultural Center (Happy Camp)

The Nelson Collection at the Franco American Hotel Building (Yreka)

Dunsmuir Depot Museum

Preservation Links:

California Office of Historic Preservation
Online Resources for Historic Preservation in California
US National Park Service Preservation Planning ~  Plan Profile for California
US National Park Service History and Culture Preservation
National Trust for Historic Preservation Teardowns and McMansions
National Trust for Historic Preservation Western Regional Office
National Trust for Historic Preservation online magazine
Preservation Directory
California Historical Society
California Historic Building Code Regulations and Information

Historic Preservation Grant Links:

US National Park Service Historic Preservation Grants
US National Park Service "Save America's Treasures Grant Program"
Historic Preservation Incentives Information from the California Office of Historic Preservation
Mills Act Property Tax Abatement Program
Federal Historic Preservation Tax  Incentive Program
Preservation.org and their links to preservation grants can be found here:  Grants & Funding Sources

National Register for Historic Places:

National Register of Historic Places Official website.
How to complete the application for inclusion on the National Register.  Downloadable pdf form from National Park Service here.