A realistic full-body portrait of a superhero representing the Capricorn zodiac sign, named 'Mountain Climber'. This hero has a resilient and determined appearance, with a sturdy and rugged physique. The costume combines earthy and stone-like textures, symbolizing their endurance and connection to the mountains. Elements of the design should subtly resemble a mountain goat's features, like horns. The character's pose is strong and steadfast, reflecting their ambitious and practical nature. The background should be a mountainous terrain, emphasizing the hero's ability to scale any surface and their affinity with rugged landscapes, characteristic of the Capricorn sign.