majormadmax
Úlfhéðnar
The rules depend on the park you are visiting, but as of 2010, I believe, firearms are permitted.
Not sure what you mean by "the rules depend on the park you are visiting," as it is not park specific. Guns will be allowed in all but about 20 of the park service’s 392 locations, including some of its most iconic parks: Yellowstone, the Grand Canyon, Great Smoky Mountains, Yosemite and Rocky Mountain National Park. Guns will not be allowed in visitor centers or rangers’ offices, because firearms are banned in federal buildings, but they could be carried into private lodges or concession stands, depending on state laws. Visitors who want to bring a gun to a national park need only to understand and comply with state gun laws. More than 30 national parks span more than one state, so visitors need to know where they are in those parks and which state law applies.
Not surprising, there were claims that this change in 2010 would result in an increase in violence in national parks, which hasn't happened. In fact, firearms didn't even make the list of what will kill you in a national park (unless some of those suicides were from self-inflicted gunshot wounds)...
https://www.washingtonpost.com/news...ple-at-national-parks/?utm_term=.57f2dff83b26