Km 0

The route starts in Calahorra, on the banks of the river Ebro. After visiting the town we need to make our way to the Cidacos park where our Greenway starts. From here the route takes us to a nearby motorway where a tunnel takes us safely to the other side.

Once on the other side we have two choices of route.

One follows the old railway on which the Greenway is based and climbs parallel to the motorway on the right hand side to the crossroads with the road to Arnedo. At Km 1.7 we pass by the archaeological site at Cerro Sorbón, where the remains of an Iberian village are still being excavated. It is not open to visitors. Up until Autol the original surfaced has been tarmacked for the benefit of cyclists.

The second option is especially recommended to those on foot. It also starts on the other side of the motorway at Calahorra but continues straight ahead along a dirt track towards the El Perdiguero reservoir, a wetland area of some ecological value. The trail continues along the foot of the claystone heights of the Cerro Agudo.

Km 9,3

The two routes converge at Km 9.3 at the entrance to Autol. At this point the tarmac surface runs out and the trail continues to Arnedillo on a compacted earth surface. The Greenway moves to the other side of the road and care needs to be taken when crossing the road. Once on the other side, the track skirts around the village, famous for its twin sandstone monoliths called El Picuezo and La Picueza.

If we do decide to enter the village we need to remember that the Greenway leaves the town from the railway station (Km 11.7). From there a very unwelcome smell makes us walk or pedal a little faster: the smell comes from a number of wastewater settling ponds, of great ecological value as they prevent the wastewater from polluting the nearby rivers.

Km 12,4

Soon we arrive at the northern mouth of the 575 metre long Gollizo tunnel. Although the tunnel is lit, we recommend Greenway users, especially those on foot, to carry a torch in case the lights go off when we are in the middle of the tunnel. On the other side we need to take care as we will be crossing the LR 115, a busy road with fast moving traffic. After crossing the road we find ourselves in the fertile lowlands of the river Cidacos. There are market garden crops on either side of the trail which we share with a number of vehicles whose owners are allowed to use the track to reach their plots.

Km 15

From there we reach Quel where the Greenway takes its leave of the original railway route and drops down towards the river. Here we can see where wine cellars have been tunnelled into the soft earth of the river bank. The signposting is not very clear in this section so we need to be careful not to take a wrong turn.

Now we head for Arnedo, at Km 19. Here the route of the original railway line has been swallowed up by the streets of the town, so our Greenway takes another, far pleasanter route.

Just 200 metres from the old railway workshops at the entrance to Arnedo, a path winds its way between market garden crops towards the Cidacos river. At Km 20.7 we reach the foot of the bridge carrying the Cornago road over the river. Here our Greenway passes through another riverside park some 3.4 km long. Along the way we pass a track leading to the sanctuary of the Virgin of Vico (Km 23.9). The Virgin of Vico is much revered in this area.

Km 24,5

At the end of the riverside section we return to the old railway line where the Greenway makes its trouble-free way to Herce. At Km 27 we come across Herce station, now home to a youth hostel catering for groups. From here the Greenway climbs gently above the Cidacos valley.

Km 30

LSoon we arrive at Préjano station where a spur line, now refurbished as the Préjano Greenway, leads to the town itself. After the station the trail enters its final and most spectacular section: the Arnedillo ravine. The track, now tarmacked again, crosses the narrow Préjano road on two occasions, running tight against the limestone bluffs of the Sierra de Préjano. The steep walls of the canyon, designated as an ASPB (Area of Special Protection for Birds), are home to a colony of griffon vultures. Beside the Greenway, some 500 metres before Arnedillo, there is a small Interpretation Centre with a "Vulture Lookout" equipped with a video camera for those wishing to observe these birds.

On the far side of a bridge built specifically for this route, the trail passes through the second of the two tunnels on our Greenway. It is 550 metres long and well lit, although there is an alternative parallel path for those wishing to avoid it.

Km 34

The station at Arnedillo is the last surprise on the Greenway; it has been refurbished as a municipal swimming pool, no less! Opposite this facility, on the far side of the river, are the steaming waters of the thermal baths of Arnedillo which travellers are welcome to enjoy.