The Susitna River, Alaska’s longest free-flowing, undammed river, is a lifeline for people, wildlife, and the environment — providing clean water to local communities and sustaining rich ecosystems that depend on healthy salmon runs.

This year, it ranks #8 on American Rivers’ 2025 list of America’s Most Endangered Rivers, which highlights rivers facing urgent threats, that have high value to people and nature, and that present a critical decision point in the coming year where public action matters.

Read more here.