Park in the El Paso car park, near the monument to the Bardenas shepherds (El Pastor
Bardenero).
(S/E) Take the track to the East and join a crossroads of tracks.
(1) Continue straight ahead on the Camino de Peñarrostro. Stay on this path until you reach a trail junction.
(2) Turn left at 90° along this path towards a ruin. Leave the path and turn right, heading South-East between two fields, then along the edge of the field. After a few bends, reach a new crossroads at the foot of the Tres Mugas summit.
(3) Turn left at 90° to complete the ascent to the summit of Tres Mugas.
(4) Return to the previous crossroads.
(3) Head West along the edge to rejoin the trail.
(5) Turn left to the South, ignoring a right and then a left turn to keep heading South towards Puy Águila. Reach a Y junction of 2 trails.
(6) Take the right-hand track heading south, skirting Puy Águila, and continue until you reach another trail junction.
(7) Take the perpendicular track to the right until you reach a track suitable for motorized vehicles.
(8) Take this Cañada Real de los Roncaleses track to the right, heading North, and follow it back to the El Paso car park (S/E).