This document discusses open source mapping efforts in Lesotho. It notes that in 2015, Lesotho had no good electronic maps and OpenStreetMap (OSM) was started to help with evidence-based planning. OSM mapping progressed rapidly and Lesotho now has the most nodes per capita of any country. Local planning is now based on OSM data. The document raises questions about sustaining the OSM community and recruiting new mappers, especially youth, and discusses using new tools like Mapillary and Field Papers.