The paper examines the effects of two TEF management scenarios in the eight-state region of southeast Mexico and the effects on CO2 mitigation. The authors also modeled two scenarios to examine possible adjustments to the region's C-flux estimate by accounting for regrowth of degraded forests and increases of C stocks in mature forests. Potential TEF distribution in the study area and current data from a Mexican forest inventory are compared to calculate areas available for modeling land-based C flux and mitigation options. A simple spreadsheet model was developed to evaluate possible C conservation through reforestation and reduced deforestation as well as improvements to the region's C-flux estimates from degraded land regrowth and C accretion in mature forests.