If federal government shuts down October 1, will NPs stay open? It's up in the air

Though federal agencies were being told Thursday to prepare for a shutdown if Congress fails to reach a budget agreement before October 1, whether national parks would stay open for visitors remains to be seen.

Under President Trump parks remained open during the budget deadlock in 2018-19, though services were shuttered and park personnel reduced.

https://www.nationalparkstraveler.org/2021/09/whether-national-parks-would-remain-open-during-government-shutdown-remains-be-seen