![The banks of the Kobuk River in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869396.5hrJ3RWU.jpg) The banks of the Kobuk River in Kobuk Valley National Park |
![Trumpeter Swans take flight in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869397.vgQGb3Cz.jpg) Trumpeter Swans take flight in Kobuk Valley National Park |
![A Bald Eagle perched on the banks of the Kobuk River in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869398.oGetrhbZ.jpg) A Bald Eagle perched on the banks of the Kobuk River in Kobuk Valley National Park |
![A Bald Eagle takes flight in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869399.ssiUBsoF.jpg) A Bald Eagle takes flight in Kobuk Valley National Park |
![Atop the Great Kobuk Sand Dunes in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869400.E4scLFMi.jpg) Atop the Great Kobuk Sand Dunes in Kobuk Valley National Park |
![The Great Kobuk Sand Dunes in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869401.9qXnY78t.jpg) The Great Kobuk Sand Dunes in Kobuk Valley National Park |
![Drifts on the Great Kobuk Sand Dunes in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869402.n9DDVgPv.jpg) Drifts on the Great Kobuk Sand Dunes in Kobuk Valley National Park |
![Plant life on the Great Kobuk Sand Dunes in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869403.9tW82Dld.jpg) Plant life on the Great Kobuk Sand Dunes in Kobuk Valley National Park |
![The edge of the boreal forest and the Great Kobuk Sand Dunes in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869404.1FYQ6lAo.jpg) The edge of the boreal forest and the Great Kobuk Sand Dunes in Kobuk Valley National Park |
![A small flowering plant on the Great Kobuk Sand Dunes in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869405.IGoYXMSj.jpg) A small flowering plant on the Great Kobuk Sand Dunes in Kobuk Valley National Park |
![The near barren Great Kobuk Sand Dunes in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869406.dga2qrZZ.jpg) The near barren Great Kobuk Sand Dunes in Kobuk Valley National Park |
![The edge of the Great Kobuk Sand Dunes in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869407.Mb2xVSBu.jpg) The edge of the Great Kobuk Sand Dunes in Kobuk Valley National Park |
![A wild iris in the bogs of Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869408.Akt66XoD.jpg) A wild iris in the bogs of Kobuk Valley National Park |
![A yearling cub goes up a tree as instructed by its mother in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869409.3eE4Y6qB.jpg) A yearling cub goes up a tree as instructed by its mother in Kobuk Valley National Park |
![A black bear stands ready to protect its cub from intruders in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869410.wM6tqGtW.jpg) A black bear stands ready to protect its cub from intruders in Kobuk Valley National Park |
![A young eagle sits on top of a spruce tree in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869411.sL80Mthm.jpg) A young eagle sits on top of a spruce tree in Kobuk Valley National Park |
![A shaft of permafrost juts out from the bank of the Kobuk River in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869412.V1sJp1ii.jpg) A shaft of permafrost juts out from the bank of the Kobuk River in Kobuk Valley National Park |
![The banks of the Kobuk River in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869413.S8eIEnYJ.jpg) The banks of the Kobuk River in Kobuk Valley National Park |
![The banks of the Kobuk River in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869414.RIrPHE6x.jpg) The banks of the Kobuk River in Kobuk Valley National Park |
![A Sandhill Crane walks in the waters of the Kobuk River in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869415.6yp5UcIm.jpg) A Sandhill Crane walks in the waters of the Kobuk River in Kobuk Valley National Park |
![The Baird Mountains in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869416.p9FrBxjB.jpg) The Baird Mountains in Kobuk Valley National Park |
![The Baird Mountains and the boreal forest in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869417.t1nQHf0d.jpg) The Baird Mountains and the boreal forest in Kobuk Valley National Park |
![The Baird Mountains as seen from the Kobuk River in Kobuk Valley National Park](https://a4.pbase.com/g9/17/606817/3/160869418.dhbPaObb.jpg) The Baird Mountains as seen from the Kobuk River in Kobuk Valley National Park |
![The Great Kobuk Sand Dunes and the Kobuk River (top) in Kobuk Valley National Park as seen from the air](https://a4.pbase.com/g9/17/606817/3/160869421.26KpiGzL.jpg) The Great Kobuk Sand Dunes and the Kobuk River (top) in Kobuk Valley National Park as seen from the air |
![A portion of the Great Kobuk Sand Dunes in Kobuk Valley National Park as seen from the air](https://a4.pbase.com/g9/17/606817/3/160869422.tbGF9Qxn.jpg) A portion of the Great Kobuk Sand Dunes in Kobuk Valley National Park as seen from the air |