The Southern Cone countries of Chile, Argentina and Uruguay have a common background regarding land use and land cover with a total of 46 million ha of forests whose benefits are prospering for the regional framework of the Southern Cone. The three countries do not articulate or interchange on their forest policies beyond circumstantial agreements. In this regard, and as our first research focus, we examined experiences while participating in the international Montreal Process on Criteria and Indicators for the Conservation and Management of Temperate and Boreal Forests. Secondly, we focused on the progress these processes have afforded regarding respective national implementation of criteria and indicators for sustainable forest management (C&I for SFM) and uptake in forest policy. Thirdly, we examined also the obstacles experienced during participation and implementation. We based our findings on content analysis of key documents and author observations. Albeit the institutional and political frameworks between the countries differ, we found common constraints on budgeting, limited human resources and institutional capacity. Communication to society and policy makers' commitment are also important weaknesses. The engagement of the three countries in the Montreal Process and the application of related national sets of C&I for SFM have provided solutions to recent land use conflicts. This also strengthened the quality and effectiveness of recently approved laws and regimes for a sustainable forest management. In conclusion, the forest dialogues of these countries, within and between each other, were reinforced by participation in C&I for SFM processes, helping to bridge the gap between decision-makers, national forest agencies, academia and other forest-related stakeholders. Common indicators and related national reports facilitated the identification of affinities for regional integration on a common basis and helped to raise the level of national forest policies increasing its strength and commitment to global forest challenges. The lessons learned should be considered to reach progress towards sustainability.