Bükkös-patak-völgye – Lajos-forrás – Zengő-völgy

A full-day valley route from the Bükkös-patak past the Lajos-forrás spring and into the Zengő-völgy on the Csobánka side. The path stays mostly in forested valleys with stream crossings — shaded in summer, muddy after rain. There's no bus at either end, so plan an out-and-back from a parked car or pair it with a connecting trail.