Cleaning up litter may be one of the less glamorous parts of working as a national park ranger, but at Yellowstone National Park, the job is particularly important because trash can pose a serious threat to the park’s geothermal features.
uncertain
trash → clean → features
With more than 4.5 million visitors each year, Yellowstone rangers regularly remove litter from some of the park’s most popular areas, including Old Faithful and Midway Geyser Basin.
asserted
rangers → remove → Faithful
While food wrappers, tissues and water bottles are among the common items found, strong winds can also send visitors’ belongings into the park’s hydrothermal features.
asserted
winds → find → features
According to the United States Geological Survey (USGS), Yellowstone’s geology team has removed more than 20,100 pieces of trash from geothermal areas so far in 2026.
uncertain
team → accord → 2026
They have also collected more than 5,000 rocks and sticks and, surprisingly, 280 visitor hats.
asserted
They → collect → rocks
More than 280 visitor hats were collected across Yellowstone in 2026.
asserted
hats → collect → 2026
“No matter the type of debris, it needs to be removed,” the USGS said, explaining that foreign material can damage or permanently alter hydrothermal features by clogging water supplies, blocking or diverting runoff channels, or introducing chemicals and sediment.
asserted
material → need → chemicals
Among the hundreds of hats recovered this year are a FIFA 2026 Men’s World Cup hat, a baseball cap labelled “COWBOY HAT” and a Roblox bucket hat from St.
Kitts and Nevis.
asserted
hat → recover → Kitts
After the 2026 season ends, hats that can be reused will reportedly be washed and donated to local organisations.
uncertain
that → end → organisations
Yellowstone’s hot springs are not wishing wells
asserted
springs → wish → wells
Rangers urge visitors to stash their trash while exploring Yellowstone.
asserted
Rangers → urge → Yellowstone
Coins are another recurring problem for Yellowstone’s geothermal areas.
asserted
Coins → recur → areas
“Contrary to (apparently) popular belief, hot springs are not wishing wells!” the USGS warned.
asserted
USGS → wish → wells
The agency explained that coins can clog hydrothermal vents and harm bacterial and algal formations, with resulting damage potentially taking months or even years to recover.
asserted
damage → explain → months
As of September 2026, Yellowstone staff had collected more than $18 in coins.
asserted
staff → collect → coins
Some had been deliberately tossed into hot springs and geysers, while others were likely dropped accidentally between boardwalk planks.
asserted
others → toss → planks
The collection has included not only US currency but also pesos, yen, euros and Canadian dollars.
asserted
collection → include → currency
Camera lens caps, pacifiers and hotel key cards among items found
AirPods, golf tees and Invisalign retainers were among the unusual finds.
asserted
AirPods → find → finds
The park’s geology team has also recovered a surprising assortment of everyday objects this year.
asserted
team → recover → objects
Some of the most frequently found items include 54 camera lens caps, 47 hair ties, 42 pencils, 36 pairs of sunglasses, 20 hotel key cards and 17 baby pacifiers.
asserted
Some → find → sunglasses
Among the items listed by the USGS were AirPods, golf tees, an inhaler, six Invisalign retainers, 15 fake nails, floss picks and a lump of glittery slime believed to be a children's toy.
asserted
AirPods → list → slime
Other children's toys have also ended up in the park, including miniature figures, bouncy balls, fidget spinners and rubber ducks.
asserted
toys → end → figures
The USGS also highlighted some of the staff’s favourite discoveries, including seven Polaroid photographs.
asserted
USGS → highlight → photographs
Several of the photographs reportedly depicted the very hydrothermal features where they were found.
uncertain
they → depict → features
Yellowstone souvenir pennies and Pokemon cards were also among the more unusual items recovered.
asserted
pennies → recover → items
Why removing trash from geothermal areas matters
asserted
removing → remove → areas
The litter cleanup is not simply about keeping Yellowstone looking pristine.
asserted
cleanup → keep → Yellowstone
The park’s hydrothermal features are delicate, and introducing foreign objects can interfere with their natural processes.
asserted
introducing → introduce → processes
The USGS said Yellowstone’s Geology Program staff, who are trained in safely navigating hydrothermal areas, carry out much of the removal work.
asserted
who → say → work
Alongside collecting trash and other debris, they monitor chemical and temperature conditions, assess hydrothermal incidents and educate visitors.
asserted
they → collect → visitors
Visitors are encouraged to “stash their trash” by keeping wrappers, paper and other lightweight items securely inside pockets or bags, or disposing of them in trash cans.
asserted
Visitors → encourage → cans
And for those visiting Yellowstone’s windy geothermal areas, the USGS has one final piece of advice: “If you’re adventuring in a windy area, consider tightening or taking off your hat.”
asserted
you → visit → hat
The Aporia
