Best lakes around Arcos De Jalón are found in a municipality in the province of Soria, Spain, characterized by its unique wetland and the scenic Jalón River. The area features notable aquatic attractions, including a distinctive karst wetland and the impressive gorges of the Jalón River. These natural features contribute to a diverse landscape, offering opportunities for outdoor activities and wildlife observation. The region provides a blend of rare ecological sites and picturesque riverine environments.
Last updated: July 4, 2026
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The Judes Lagoon is a karst wetland located in the town of Judes, within the municipality of Arcos de Jalón, in the province of Soria, Castile and León. It is the only lagoon of its kind in the province, as most are of glacial origin.
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It's a small but beautiful reservoir. You can see the water entering through a canal and exiting through pipes to the power plant.
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In the middle of the field, there are two ponds from which the area's livestock benefit. AT the time we visited them they were dry.
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Judes Lagoon only has water in wet years, in winter and spring. It is curious to see the corner of rocks where the Water of the Gorgoncil Stream reaches
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Judes Lagoon is a lagoon formed by the subsidence of limestone (karst) terrain. It usually has water at the end of winter and in spring. In wet years, it overflows, and the excess water flows down to the Almuguera de Chaorna stream, forming beautiful waterfalls called Chorroneras, very close to the town.
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In summer it is likely to be dry. I advise following the tracks marked by IMBA in the area before the GR86 which has non-cyclable sections in the middle of the field
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The aquatic features near Arcos de Jalón are distinctive, primarily featuring a unique karst wetland and the scenic Jalón River. The most notable is Laguna de Judes, a temporary karstic lagoon, which is the only one of its kind in Soria province. The area also includes the small but picturesque Río Blanco Reservoir and Las Balsas del Pariazo, which are ponds used by local livestock.
For the temporary Laguna de Judes, the best time to visit is typically at the end of winter and in spring, when it usually holds water. In wet years, it may even overflow, creating beautiful waterfalls. During summer, it is likely to be dry. The Jalón River and its gorges can be enjoyed year-round, though spring and autumn offer pleasant temperatures for outdoor activities.
Yes, there are several hiking opportunities in the region. You can explore routes like the Way of El Cid (GR 160) or circular trails around Somaén and the Río Jalón. For more detailed information and route options, check out the Hiking around Arcos De Jalón guide.
Beyond hiking, the area around Arcos de Jalón offers excellent cycling opportunities. You can find various routes for road cycling and touring bicycles, often following the scenic Jalón River or exploring the wider Medinaceli region. Fishing, particularly for trout, is also popular along the Jalón River. Explore more options in the Road Cycling Routes around Arcos De Jalón and Cycling around Arcos De Jalón guides.
Wild swimming is generally not recommended in the specific 'lakes' mentioned. Laguna de Judes is a temporary karst wetland, not suitable for swimming, and Río Blanco Reservoir is a small reservoir connected to a power plant. The Jalón River itself may offer spots for cooling off, but always exercise caution and check local regulations.
The region is rich in natural beauty beyond its lakes. The Gargantas del Jalón (Jalón Gorges), extending from Somaén to Jubera and Lodares, are a significant attraction. They feature spectacular rocky landscapes, small caves, and even a small waterfall. These gorges are also an excellent spot for observing raptors.
While the specific 'lakes' are more about natural observation than recreational activities, the general area offers opportunities for families. Short walks along the Jalón River or exploring the edges of the Laguna de Judes (when wet) can be enjoyable. Always consider the temporary nature of some water bodies and plan accordingly.
Access to the more remote natural features like Laguna de Judes or the Jalón Gorges typically requires a car. Parking is usually available in or near the towns closest to these sites, such as Judes for the lagoon. Public transport options directly to these natural spots are limited, so driving is the most convenient way to explore the region.
Las Balsas del Pariazo are two ponds located in the middle of a field, primarily serving as a water source for local livestock. It's important to note that these ponds can be dry at certain times of the year, depending on rainfall and seasonal conditions.
The Jalón River and its gorges are known for being a good spot for observing raptors. The unique ecosystem of Laguna de Judes, when it holds water, supports various wetland species. The general riverine environment provides habitat for diverse flora and fauna typical of the Soria province.
Most natural areas and trails around Arcos de Jalón are dog-friendly. When visiting, always keep your dog on a leash, especially near livestock or wildlife, and ensure you clean up after them. Be mindful of the temporary nature of some water bodies, as they may not always provide water for pets.

