The Lake of The Woods is located in southeastern Colorado, and has been a popular spot for hiking for over a century.
But, in the past year, the popular hiking trail has seen a steep decline in popularity due to poor water quality.
The trail is the second-highest water quality on the planet, and the park was the first national park in the US to implement a “sink-free” rule in the 1970s.
That year, more than 2,000 people were reported to be drowning every year, and many died.
The park is now a “water-sink zone,” meaning visitors are not allowed to bring back water to the lake, and no longer use their own water bottles, according to the park.
The water is treated and returned to the water source before the end of the day.
This year, in addition to the “suck-out” rule, the park announced a water quality audit.
A water quality survey found the lake’s water quality was good, but not ideal, according the park website.
“In the past two years, we’ve seen a lot of activity along the lake and water quality improved.
However, the lake is not without its challenges,” the park said in a statement.
In addition to an audit, the parks website says the lake will not be allowed to be used for recreational use, and will be closed to visitors from June 3 to July 5.
The lake has been closed to the public for about five months.