Here is a look at how the laws related to carrying firearms read for the National Park Service and the state of Washington.
Supporters of a push to change the park regulations want the rules to be consistent with the state where the park is located.
Code of Federal Regulations
TITLE 36–PARKS, FORESTS, AND PUBLIC PROPERTY CHAPTER I–NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR Sec. 2.4 Weapons, traps and nets.
(a)(1) Except as otherwise provided in this section and parts 7 (special regulations) and 13 (Alaska regulations), the following are
(i) Possessing a weapon, trap or net
(ii) Carrying a weapon, trap or net
(iii) Using a weapon, trap or net
(3) Traps, nets and unloaded weapons may be possessed within a temporary lodging or mechanical mode of conveyance when such implements are rendered temporarily inoperable or are packed, cased or stored in a manner that will prevent their ready use.
Washington State Constitution
Article 1 Section 24
RIGHT TO BEAR ARMS. 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.