Historic archaeological resources in the American West are increasingly at risk of loss because of prolonged droughts, wildfires, earthquakes, general deterioration, and the negative impact of increasing visitation. Casual visitors regularly remove objects from their original contexts in the landscape, either taking them home as souvenirs or bringing them to local staff because they are concerned about the items disappearing. As a result, many sites of cultural significance are losing the ability to convey the information required for scholarly interpretation and for drafting community and life histories of their past residents. We argue that citizen science and mobile apps specifically designed for site stewardship are viable tools for alleviating negative human impacts on cultural landscapes and enhancing our capacity to record and monitor sites of cultural heritage. We contend that our approach uses an innovative interface, the Citizen Preservationist app, an open-source hybrid mobile/desktop software we developed to foster both current use and protection of archaeological sites and historic parks. We demonstrated the viability of our app by conducting a user study at Bodie, California (ca. 1859–1942), that assessed how this software promotes a sense of stewardship and appreciation for the archaeological heritage of this beloved California State Historic Park.