Wine Denomination from Alto Adige
Lago di Caldaro DOC, also known by its German name Kalterersee, is a denomination established in 1970 covering a red wine produced in the southern part of Trentino-Alto Adige. It takes its name from Lake Caldaro (Kalterer See), a glacial lake in the heart of the production zone. The denomination holds historical significance as one of the oldest and most recognized wine areas in the Alto Adige region, with a winemaking tradition dating back several centuries under Austrian influence.
The production area spans the province of Bolzano in Alto Adige, extending southward into the province of Trento, covering municipalities around the shores of Lake Caldaro and the Adige Valley. The terrain consists largely of morainic hills and slopes left by glacial activity, with vineyards positioned between approximately 200 and 600 meters above sea level. A classico sub-zone exists, covering the original and most historically established production area immediately surrounding the lake itself.
The wine is produced predominantly from Schiava (known locally as Vernatsch), which must account for a minimum of 85% of the blend. Schiava encompasses several biotypes permitted under the regulations, including Schiava Grossa, Schiava Gentile, and Schiava Grigia. Up to 15% of the blend may consist of Pinot Nero and Lagrein, two varieties well established in the Alto Adige wine tradition.
Vineyards are typically trained on the traditional pergola system, which is well suited to the steep terraced slopes of the region, though Guyot training is also employed. Fermentation is generally brief and conducted at controlled temperatures to preserve the light, fruity character of the Schiava grape. The wine is not subject to extended aging requirements, and most producers release it within the year following harvest to maintain freshness.
Lago di Caldaro presents a light to medium ruby-red color, often with violet reflections, and a tendency toward garnet as it ages. The nose offers aromas of fresh red cherry, raspberry, and light almond, with occasional floral hints of violet. On the palate it is light-bodied with soft tannins, lively acidity, and a slightly bitter almond finish that is a hallmark of the Schiava variety.
The area benefits from a microclimate moderated by Lake Caldaro itself, which stores heat during the day and releases it at night, reducing the risk of frost and extending the growing season. Soils are predominantly moraine-derived, composed of gravel, sand, and loam with varying proportions of porphyry and limestone, which contribute to the wine's mineral freshness. The combination of Alpine ventilation from the north and warm Mediterranean air currents from the south creates growing conditions that allow Schiava to ripen reliably without losing its natural acidity.
The minimum alcohol content required for Lago di Caldaro DOC is 10.5% by volume, with the classico sub-zone requiring a slightly higher minimum. Maximum grape yield in the vineyard is set at 14 tonnes per hectare, a relatively generous limit that reflects the variety's naturally productive nature. A superiore designation exists for wines reaching at least 11% alcohol, indicating a riper, slightly more structured expression of the denomination.