Hoces del Río Riaza Natural Park
Just 35 kilometres south-east of Aranda de Duero, the Hoces del Río Riaza carves a dramatic limestone gorge through the Castilian meseta, home to one of Spain's largest Griffon vulture colonies and a landscape that feels genuinely wild. It is one of the most accessible yet undervisited natural parks in the entire region.
The Gorge & the Vultures
The Río Riaza has cut a narrow, cliff-lined canyon up to 100 metres deep through the pale limestone, and the thermal currents that rise from the rock faces attract hundreds of Griffon vultures (Gyps fulvus) year-round. Bring binoculars: on a warm morning you can watch dozens of them riding the thermals at eye level from the mirador above Montejo de la Vega.
The park's main viewpoint, the Mirador de los Buitres near the village of Montejo de la Vega de la Serrezuela, offers a railed platform directly above a nesting cliff. Arrive before 10:00 in summer for the best activity; the birds become less visible once the day cools in late afternoon.
Walking & Exploring
A marked circular trail of roughly 8 km follows the rim of the gorge from Montejo village, passing through holm oak scrub and offering repeated views down to the turquoise-green river below. The path is well-signed but rocky in places — wear proper walking shoes rather than trainers.
The village of Montejo de la Vega de la Serrezuela itself is a quiet, stone-built Castilian hamlet with a 16th-century church and a single bar-restaurant where the owner will happily pack you a bocadillo for the trail. The drive from Aranda along the SE-30 road is itself scenic, crossing rolling wheat fields and vineyards.
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