San Carlos is a 3.82 hectare coffee farm in Mosonte, El Avión, owned and managed by producer Carlos Bautista López. Lying at an average elevation of about 1700 metres above sea level it is reported locally as the country’s second-highest coffee-producing farm. 

The property was purchased more than twenty years ago and named both for the owner and in honour of Saint Carlos, to whom the family has a particular devotion. Harvest runs from January through April and yields average around 60 qq oro (exportable green coffee equivalent) per year. Labour is lean: the owner works the farm full-time, brings in roughly three additional workers for periodic agronomic fieldwork, and expands to as many as twenty people during peak picking. The principal coffee varieties in production are Red Catuai, Caturra and Maracaturra. Production is semi-technified: one soil (edaphic) application of synthetic fertiliser and one soil application using coffee pulp are carried out annually, complemented by two foliar fertiliser applications that are tank-mixed with low-impact fungicides and insecticides. Shade is actively regulated through pruning and canopy management; the farm is 100% shaded, with an estimated shade intensity of 40–50%. 

Processing is fully washed. Only ripe cherry is selectively picked, floated for density separation, and depulped before a controlled fermentation of roughly 24–36 hours, after which parchment is washed. Coffee is then pre-dried (oreado) on the farm in crates while additional volumes accumulate; lots are kept segregated by moisture status and protected from dust and other contaminants until collected by Cafetos de Segovia by pick-up truck. On-farm holding in crates does not exceed about 72 hours. At the dry mill the coffee is transferred into polypropylene macen sacks and finished by patio and/or raised-bed drying over approximately 10–12 days. Water for wet processing comes from an on-farm source; the small, improvised wooden wet mill is intentionally sited about 100 metres away, and honey waters are channelled to treatment pits to avoid discharge into the water supply. Pest and disease management relies on continuous field monitoring and rapid, targeted spot interventions as soon as problems are detected. No other crops are grown. The producer reports that climate change is driving pest and disease pressure upslope into higher altitudes that were previously less affected, while also contributing to irregular flowering patterns and to longer dry spells punctuated by periods of intense, concentrated rainfall.