Knowing the trail markings in Spain is essential for a safe and enjoyable hike, as they tell you not just the way, but also the type of trail you're on. The main system for marking hiking trails across Spain (and other countries in Europe, like France) uses a combination of two horizontal color stripes, called "blazes," painted on rocks, trees, or posts. The colors indicate the category and length of the route: The Trail Blaze Code Blaze (Stripe Colors): White over Red - GR (Gran Recorrido - Long Distance). Long-distance routes, typically over 50 km, requiring multiple days or weeks (like the GR-11 in the Pyrenees). White over Yellow - PR (Pequeño Recorrido - Short Distance). Shorter routes, typically between 10 km and 50 km, manageable in one or two days. White over Green - SL (Sendero Local - Local Trail). Very short routes, usually under 10 km, often circular, and great for a quick, easy outing. How to Follow the Blazes The shape of the painted blaze tells you what to do at a junction or point of interest: Two parallel stripes - You are on the correct path. Keep going straight. An angle or V-shape - Direction Change. The trail makes an abrupt turn. Follow the direction of the angle. (e.g., if the stripes turn right, you turn right). An X or crossed stripes - Wrong Way. Do NOT follow this path. You may see this near a junction to indicate the path that is not the designated route. Turn back to the last correct marker and find the proper direction. Important Notes - White is Key: Notice that the white stripe is always the top stripe in this official system, with the colored stripe below it. - Camino de Santiago Exception: The famous Camino de Santiago routes often use their own distinct markers, primarily a Yellow Arrow or the Scallop Shell (Concha), rather than the red/yellow/green blazes. If you are hiking the Camino, stick to those unique markers. - Other Blazes: In some areas, you may see single color dots or stripes (like just a blue dot) which can indicate variants, local routes, or even a system used for mountain biking, but the white/color stripe system is the most standardized for hiking.