The route takes riders through some of the most sparsely populated and beautiful parts of Spain. Much of the ride along the river winds through a deep canyon. Although the route follows the river downstream, there is significant climbing (and some of it steep) everyday, but the pay off, terrific views and then long downhill stretches, is well worth it. The tour is ranked 2?, but it is a 3.
The route takes riders through interesting villages steeped in history. You'll see churches, castles, bridges, plenty of wheat and sunflower fields. There are quite a few opportunities to get off the bicycle, see the sites and interact with the locals. Be sure to see the castle and the cathedral in Frias. In Laguardia we arrived in time to witness the "running of the cows", an annual festival featuring a parade of town dignitaries and marching band that culminates with the release of cows that romp through the cobblestone streets. A good time was had by all, except maybe for the cows.
We took the tour during a record-setting heatwave, three days of temperatures over 100 degrees, so we started early each day to get to the next hotel before the heat became unbearable. I'd plan to do this trip during a time of year more likely to offer moderate temperatures.
The hotels were always good. However the Posada de Ormas, Hotel Romanca and the Hospederia de los Parajes in Laguardia were outstanding.
All in all this is a good tour and a great value.