The information and links provided here are not legal advice or a restatement of laws, you are responsible for validating all laws and regulations on your own.
Federal Firearm Laws and Regulations
There are public places that have a "no guns allowed" policy even for gun owners who hold legal right-to-carry permits, where state laws are pre-empted by federal law and no guns are allowed.
Prohibited Areas (federal)
Firearms in Parks
It is up to visitors to understand the requirements of federal law and the laws of the states/localities they live in and are travelling to (or through). Park websites offer basic information about the applicable state law(s) and will generally include a link to a state website with more information.
National Rifle Association (NRA)
Washington State Firearm Laws and Regulations
STATE CONSTITUTIONAL PROVISION - Article 1, Section 24.
“The right of the individual citizen to bear arms in defense of himself, or the state, shall not be impaired, but nothing in this section shall be construed as authorizing individuals or corporations to organize, maintain or employ an armed body of men.”
Revised Code of Washington (RCW)
The Revised Code of Washington (RCW) is the compilation of all permanent laws
Title 9.41 RCW and Title 9A RCW have many Chapters and Sections, below are links
Title 9 RCW - CRIMES AND PUNISHMENTS
Title 9A RCW - WASHINGTON CRIMINAL CODE
Information on Use of Deadly Force - Issues to Consider
Lewis County Washington Sheriff