Goldstream Group recently completed an impact evaluation of Margaret A. Cargill’s Philanthropies’ (MACP) funding to the Alaska Conservation Foundation from 2011 to 2020, which supported community-led conservation work in the Tongass National Forest Region, one of the largest remaining coastal temperate rainforests in the world. MACP’s funding contributed to interrelated community-level changes in Southeast Alaska that are necessary predecessors for long-term ecological sustainability; community engagement in shared stewardship with federal and state agencies, Native corporations and landowners, and environmental organizations; and long-term positive ecological changes in forest health, salmon habitat, and deer populations. Southeast Alaska Impact Assessment Executive Summary