YELLOWSTONE - 150 YEARS

Yellowstone National Park preserves one of the largest, temperate-zone ecosystems on Earth. About 99% of the Park is managed as wilderness and Park biologists continually work to promote its natural ecological processes by restoring populations of many native species - in constructing nesting platforms for swans, suppressing non-native fish, establishing wolf den and bear management areas, rehabbing injured raptors and reviving extirpated, endangered or threatened wildlife.

Yellowstone's fortune is its wildness.