This 50-mile route starts at the Robles Trailhead on the south end of Tucson. It opens with a full loop through Robles Pass Trail Park, covering flowing desert singletrack with views of Golden Gate Mountain and the Tucson Mountains. From there, the route heads north, crossing under Ajo Way via a pedestrian underpass and entering Tucson Mountain Park.

The Trail of the Eagles' Nests follows the dramatic limestone ridges and valleys of the Kraków-Częstochowa Upland, tracing a historic route through southern Poland. True to its name, the trail connects a series of medieval castles and fortresses—known as the “Eagles’ Nests”—perched on high cliffs for strategic defense.

Spanning the Silesian and Lesser Poland Voivodeships, the route combines singletrack, dirt roads, and occasional paved segments, winding through forests, rocky outcrops, and rural villages.