Madrid's largest reservoir, on the lower Lozoya system 70–90 minutes north-east of the city. Big, scenic, serious water that is not easy to read — bank access varies by water level and the steep walled arms mean covering water is a real exercise. Holds black bass, pike, carp, and barbel. For the fly angler this is an exploratory day, not a beginner trout substitute: lower catch certainty but genuine potential for the angler willing to walk and search.
- Reservoir
- Granite

