Casa Castillo produces wines from Jumilla, a region in Murcia known for its Monastrell-based reds. The winery's portfolio centers on this indigenous variety, which thrives in the area's continental climate and limestone soils. Pie Franco, a Monastrell wine, represents the estate's highest expression. Vino de Finca, also Monastrell, and a Monastrell-Tempranillo blend round out the core range. These wines have been assessed by Wine Spectator, Decanter, Wine Enthusiast, Wine Advocate, and Falstaff. Jumilla's elevation and diurnal temperature swings produce wines of depth and structure, with Monastrell delivering dark fruit, spice, and tannin backbone characteristic of the region.