The route leaves the province of Toledo and enters the lands of Ciudad Real. The Alcázar de San Juan Lagoon Complex Natural Reserve is made up of the trio of the Veguilla, Camino de Villafranca and Las Yeguas lagoons, it is another wetland of great environmental quality, diversity and ornithological value in the La Mancha plain. The presence of birds depends on the season of the year and the water status of the lagoons. In good environmental conditions it is one of the La Mancha wetlands with the greatest ornithological diversity. In different seasons it is possible to observe stilts, stilts, grebes, shelducks, and pochards. , ducks, teals, coots, red and shoveler ducks, egrets, purple herons, marsh harriers and flamingos. And in the steppe environment of the agricultural hills, little bustards, Iberian sandgrouses, lesser kestrels, red kites and ospreys can appear. A spectacle of ornithological nature associated with the wetlands of La Mancha, very easy and close to observe while riding a bicycle because the birds are hardly intimidated. At several points you can leave the main itinerary to get closer to the shore and see the birds up close. The passage through Alcázar de San Juan is the longest urban journey of the day, it crosses the center of the town and exits through a small railway tunnel towards Campo de Criptana.