Forest restoration is a vital strategy to combat climate change, preserve biodiversity, and maintain ecosystem services. Yet, scarce evidence exists evaluating the impact of forest recovery interventions at scale. This study estimates the impact of the Atlantic Forest Restoration Pact ("PACTO") on forest restoration in Brazil. Using spatial land cover and forest change data on private land from 2009 to 2019, we isolate the causal effect of PACTO through post-matching differences-in-differences estimation. We find that the intervention increased restored forest cover by 9-21 percentage points, likely because it helped to overcome key barriers faced by private landowners. Larger effects are associated with greater distance to cities and more state-level environmental enforcement. These findings demonstrate that large-scale forest restoration on private land is possible, but that low opportunity costs of competing land uses and complementary institutional environments play key roles in supporting these efforts.