Skip to navigationSkip to main contentSkip to footerAct NowClose this messageNPCA HomeYour gift will be TRIPLE matched TODAY ONLY to 3X your impact for the parks.Help protect your national parks during our Membership Month Centennial Challenge. Every $1 you give today becomes $3 to help protect America’s most treasured places.Our national parks need protection like never before and YOU can help!Thank you for helping us reach our Membership Month campaign goal by midnight tonight.MATCH MY GIFTNPCA HomeAbout UsSearchSearchmagnifying glass iconDonateMenuNPCA@100A Century of ImpactOur HistoryNPCA@100 TimelineSelected VictoriesNews & ResourcesAll NewsAll ResourcesBlogMagazinePress ReleasesPolicy UpdatesIssuesAirClimate ChangeEnergyHistory & CultureLandscapesPark FundingVisitor ExperienceWaterWildlife2019 Polluted Parks ReportHow America is Failing to Protect Our National Parks, People and Planet from Air PollutionParksFind a parkTravelAlaskaMid-AtlanticMidwestNortheastNorthern RockiesNorthwestPacificSoutheastSouthwestSun CoastTexasGet InvolvedTake ActionAttend an EventShare Your StoryTravelDonateGiveDonateJoinRenewMonthly GivingGift MembershipsMemorial & Tribute GivingMore Ways to GivePartner with NPCATrustees for the ParksEstate PlanningNational Parks Conservation AssociationHow America Is Failing to Protect Its ParksNew report finds 96 percent of national park sites suffer from air pollution. Learn More©Margaret619 | DreamstimeOur MissionWe're protecting and enhancing America's National Park System for present and future generations.Blog PostHow a Border Wall Could Harm Two Desert Parks: A Closer LookMay 2019| By Kevin Dahl, Chris ClarkeThe federal government could soon install new bollard wall on portions of the southern border, including 78 miles of barriers near National Park Service land. These barriers could increase…Blog Post10 Parks You Helped Put on the MapMay 2019NPCA and its supporters have worked for a century to protect every one of our national park sites — and to expand our National Park System to include more…Magazine ArticleFighting for the GrizzlySpring 2019| By Nicolas BrulliardNPCA and others have worked for decades to protect Yellowstone’s grizzlies. Is the long-term recovery of the iconic species now in jeopardy?More NewsFocus OnYellowstone: The World's First National ParkA River Through Golden RocksThe park gets its name from the Yellowstone River, which in turn was named for the bright mustard-colored canyon walls it flows through.Lush, Steaming, VibrantFrom the lush valleys to the rocky canyons to the steaming geyser basins to the peaceful lakes, Yellowstone's terrain is varied and vibrant.More Than Old FaithfulYellowstone is home to more than half the world's geysers and an exceptional concentration of geothermal energy.The 'Serengeti of North America'Yellowstone has the largest concentration of mammals in the contiguous United States including a high number of large predators.Read NPC