1. A path or route that is not well-known, difficult to find, or poorly marked; a pathway that is hidden or not commonly used
The hikers decided to take an obscure trail through the forest to avoid the crowded main path.
Os caminhantes decidiram seguir uma trilha obscura pela floresta para evitar o caminho principal lotado.
2. A figurative path or way that is difficult to understand or follow
He followed an obscure trail of clues to solve the mystery.
Ele seguiu uma trilha obscura de pistas para resolver o mistério.