Colchagua Valley is located in Rapel Valley, a sub-region of Chili’s Central Valley. The Colchagua Valley wine region is slightly cooler than the Maipo wine region, which is located to the north. The Valley has a consistent Mediterranean climate, with cooler nights due to the Pacific Ocean lying just south.  The Colchagua Valley is evenly distributed with white and red grape varieties. As a rule, white grapes do better in cooler climates, while red grapes fare better in warmer weather. This is especially apparent in the region, as Merlot, Carmenere, Sauvignon, and Malbec are produced in the East, which is warmer, while Sauvignon Blanc, and Chardonnay are planted in the West. Colchagua Valley is located on the Tinguiririca River and flows through the town of Santa Cruz and along the northern edge of the zone. Many wineries are located in this area. A river was formed in Colchagua from the melted ice caps of the Andean Mountain Peaks. Colchagua Valley has clay and silt soils that are ideal for grape growing. Wine enthusiasts claim the Colchagua Valley is becoming the best appellation in Chile.