When the Ebro crosses the narrow passage between rocks of the Shells of Haro, it appears in the Rioja, by where it runs winding during 120 km, before continuing its way towards the Mediterranean. In the Shells of Haro the altitude of the river is of 445 ms and when it leaves by Alfaro it goes to 260 ms. The river runs, therefore, very fast by the Rioja. The right border, the one that it has to the South, belongs to the Rioja. Only in seven occasions - Briñas, San Vicente of the Sonsierra, Logroño, Agoncillo, Alcanadre, Corner of Grove and Alfaro- crosses the Rioja the Ebro towards the North, extending few kilometers by the left border. To the South of the river, between 60 and 40 km of distance, one extends compares the Iberian mountain range, with altitudes that oscillate between the 1,000 and 2,000 ms of altitude. The mountain range it is come off towards the North, entering the Rioja, the mountain range of the Demand deeply, having in San Lorenzo with his 2,271 ms the Maxima La Riojan altitude. Of the mountain range they lower to expresses seven rivers towards the Ebro, is for that reason that to the Rioja say to him: "The one of seven valleys". They are called, of This a the West, Alhama, Cidacos, Leza, Iregua, Najerilla, Oja and Tiro'n. Although the heads of the Alhama, Cidacos and Najerilla-Neila are sorianas and the one of the Pull she is of Burgos. All the rivers of these valleys receive affluents that are forming other so many valleys with own organization, as they are those of Linares, Ocón, Jubera, Tuerto, Brieva, Viniegras, San Millán. And it exists an almost limitless number of huge precipices of splendid nature like Good Waters, Snows, Manzanares, Ardancha, Navajún, Valderresa, Ollora, Tobía, San Martín and so many and so many others. In high earth oaks grow, are and pines. And there are scrubs of junipers, boxwood, endrinas, holly, rockroses. And great slopes with fine grass for cattles equine, bovine and wool. More down we found oaks, olive trees and almonds tree. And near the Ebro, in level earth they are for cereal, beet and potato, whereas the hills are covered with immense vines of which literally flows the wines that give world-wide fame to this region. All the La Riojan rivers, including the Ebro, have a row of poplars and chopos like inseparable company. Of the La Riojan poplars Ana has written Maria Smuggling: "... to see them on the brink of madness water, upsetting the landscape, aiming as magical lances towards the unreal and mysterious country of the bottom of the river."