“Frustrated by noisy helicopters around national parks in Hawaii, Public Employees for Environmental Responsibility and the Hawaii Island Coalition Malama Pono sued to force the government to comply. The U.S. Court of Appeals for Washington, D.C., ruled in their favor in May 2020 and ordered the agencies to develop management plans for about two dozen national parks within two years, including Glacier.
The proposal for Glacier would cap the number of flights over the park at 144 per year, and park officials predict a gradual phasing-out of sightseeing tours through “attrition” of permit holders. The deadline to comment on the plan is Oct. 3.”