Sierra de Gredos is not formally a DO but has become Spain's most exciting emerging wine territory — a system of mountain ranges west of Madrid at 700–1,200m with ancient granite soils that have preserved pre-phylloxera Garnacha vines over 100 years old. The natural wine movement discovered these mountain vineyards in the early 2010s; producers like Fernando García (Comando G, El Jardín de las Iguanas) have produced wines of Burgundian transparency and mineral precision from old vines abandoned by previous generations. The sub-regions Cebreros and Méntrida overlap with formal DOs.
| Year | Rating | Notes |
|---|---|---|
| 2023 | — | Sierra de Gredos granite sites delivered exceptional transparency and mineral precision; old vines showed remarkable freshness at 900m. |
| 2022 | — | Mountain growing season was warm but altitude moderated; old-vine Garnacha maintained characteristic pale-ruby transparency. |
| 2021 | — | Reliable Gredos vintage; pre-phylloxera sandy granite soils handled the variable spring conditions with natural resilience. |
| 2020 | — | Outstanding mountain vintage; producers documented the finest Gredos Garnacha in the modern natural wine era. |
| 2019 | — | Landmark Sierra de Gredos vintage; Marañones and contemporaries produced wines of international benchmark transparency and mineral depth. |