Volcanoes
There are two active volcanos at Lake Clark; Iliamna and Redoubt. They are located on the “Ring of Fire,” directly where the Pacific Plate drives itself under the North American Plate, causing intense heat and pressure at great depths. Although Iliamna regularly emits plumes of steam, it has not had a confirmed eruption in recorded history. Redoubt, however, has erupted at least 30 times in the last 10,000 years, and four eruptive events have been confirmed in the last century alone.
Glaciers
The jagged peaks and U-shaped valleys of Lake Clark National Park were carved from glaciers. Scientists point to there having been at least three major glacial advances and retreats that slowly carved the landscape around the time of the last Ice Age. At this point, the world’s temperature was much colder, allowing for significant snowpacks to built up, creating great ice sheets that at one time covered over 50% of Alaska. Beginning around 12,000 years ago, these glaciers retreated as temperatures warmed. This retreat carved what we see today!
Salmon
Each year an average of 372,000 Sockeye, or red, salmon swim up the Newhalen River and enter the waters of Lake Clark National Park, returning to the creeks, streams, and lakes where they were born. Following freshwater births, salmon migrate to the ocean where they’ll spend anywhere from one to three years. Towards the end of their lives, instinct drives them back to the places where they hatched in order to spawn new life and then die. It is the circle of life defined. Sockeye salmon are such a critical part of the Lake Clark story that the National Park was established in part to protect sockeye salmon and their habitat. Sockeye are a critical species in the park’s ecosystems, providing nutrients to live at all levels of the food chain. Without them, the Coastal Brown Bears would not be here as they are.