Estrela Mountain Dogs are large and powerful dogs. Males typically weigh between 110 to 150 pounds (50 to 68 kg) and stand about 26 to 30 inches (66 to 76 cm) tall at the shoulder. Females usually weigh between 80 to 100 pounds (36 to 45 kg) and stand around 24 to 28 inches (61 to 71 cm) tall.

Estrela Mountain Dogs are known for their protective, loyal, and calm temperament. They are typically good-natured with their families, including children, but can be wary of strangers, making them effective guard dogs. They are intelligent and independent, which can lead to a stubborn streak, so early socialization and consistent training are important.

The breed has a thick, double coat that is weather-resistant, making it well-suited for the varying climates of the Estrela Mountains. The outer coat is coarse and straight, while the undercoat is soft and dense. Coat colors can vary and include shades of fawn, brindle, and gray, often with white markings. Regular grooming is necessary to manage shedding, especially during seasonal changes.

Estrela Mountain Dogs do best in environments where they have space to roam and engage in physical activity. They can adapt to various living situations, including rural and suburban homes, but they thrive with a yard to explore. They need regular interaction and companionship, as they are social dogs that bond closely with their families.

These dogs enjoy a variety of activities, including long walks, hikes, and playtime. They benefit from mental stimulation, so engaging in training exercises or participating in dog sports, such as obedience or herding trials, is beneficial. Regular outdoor activities allow them to use their natural instincts and maintain their physical fitness.