With Congress at an impasse, about a quarter of the federal government employees - including park rangers - are starting 2019 out of work or working without a paycheck.
Unlike some previous government shutdowns, in which national parks closed entirely, gates have remained opened under the Trump administration, though parks are severely understaffed. The park is open but areas like Mariposa Grove of Giant Sequoias, Hetch Hetch and Wawona and Hodgdon Meadow Campgrounds are all closed due to "human waste issues and lack of staffing", the Park Service said.
As President Donald Trump's government shutdown continues, one of his federal agencies is warning that he is creating a "health hazard" due to the governmental closure. "There are no trash services at this time".
"I think that we don't need the wall", Neblett said. "We are in a shutdown because Democrats refuse to fund border security".
Other parks were also seeing the effects of mounting garbage.
Additionally, Lost Horse Mine Road and Rattlesnake Canyon are closed effective immediately.
Yosemite National Park in California also daces similar struggles.
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Police said they couldn't give further information on where he came from because he wasn't carrying an identity card. Part of terminal A was closed but the two other terminals were open, police told German news agency DPA .
Due to the shutdown, most bathrooms are closed in the park, so problems related to human waste are becoming more prevalent, according to spokesperson Scott Gediman.
Yosemite Valley resident Dakota Snider said crowds were driving into the park to take advantage of free admission. Joshua Tree said it would begin closing some campgrounds for all but day use. "This is a very popular season for people that come there".
"I live and recreate at this park and I want this land to be as great as can be for everyone visiting and that seems to be the same motivation for people volunteering", he says.
Visitors were allowing their dogs to run off-leash in an area rich with bears and other wildlife, and scattering bags of garbage along the roads, Snider said.
At Joshua Tree, Lauretig and volunteers from local rock climbing business Cliffhanger Guides are handling the dirty work themselves.
John Garder, senior director of budget and appropriations at the National Parks Conservation Association, told ABC News that when park rangers aren't available to give basic safety information, visitors are less likely to be prepared. Some walking trails that are normally covered in sand have also become compressed and icy, making travel hazardous. "People are trampling and destroying the things they want to preserve without knowing it ..."
Key parts of the federal government have been impacted by the December 22 shutdown, including the departments of Homeland Security, Justice, Interior, State and Housing and Urban Development.