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Routes
Hiking trails & Routes
Spain
Madrid
Guadarrama
Torrelodones

El Gasco Dam – Tower of the Lodones loop from Torrelodones

Routes
Hiking trails & Routes
Spain
Madrid
Guadarrama
Torrelodones

El Gasco Dam – Tower of the Lodones loop from Torrelodones

Moderate

4.6

(14)

98

hikers

El Gasco Dam – Tower of the Lodones loop from Torrelodones

03:20

11.5km

290m

Hiking

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: April 22, 2026

Waypoints

A

Start point

Bus stop

Get Directions

1

556 m

Mirador Las Marías

Highlight • Viewpoint

2

4.16 km

The El Gasco dam is an unfinished dam, built at the end of the 18th century (between 1787 and 1799), on the Guadarrama River. Its ruins are located at the confluence of the municipalities of Torrelodones, Galapagar and Las Rozas de Madrid, in the northwest of the Spanish autonomous community of Madrid.

It was designed by the Spanish military engineer, of French origin Carlos Lemaur, promoted and financed by the Bank of San Carlos, under the Royal Treasury of Carlos III, in the context of the works of the Guadarrama canal, which was not completed either. , of what would have been its regulating reservoir. Through this project, it was intended to create a navigable channel of 667 km, which, saving a difference of 700 m, would have linked Madrid and the Submeseta Sur with the Atlantic Ocean, connecting the waters of four main rivers: the Guadarrama (its point of origin), the Manzanares (at the height of the Toledo Bridge in Madrid), the Tagus (as it passes through Aranjuez) and the Guadalquivir (through Seville).
Source: es.wikipedia.org/wiki/Presa_de_El_Gasco

Translated by Google •

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3

4.21 km

El Gasco Dam

Highlight • Monument

The El Gasco dam, also called Peña Strait or Carlos III Dam, is one of the most important civil engineering projects in 18th century Spain. It is located above the Guadarrama River gorge, in an area currently protected by the regional park of the middle course of the Guadarrama River and its surroundings.

Translated by Google •

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4

4.52 km

View of Presa del Gasco

Highlight • Viewpoint

It is not a viewpoint, it is a clear curve in the road.

Translated by Google •

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5

5.76 km

Canal del Guadarrama

Highlight • Structure

The initial 10 kilometers of the Guadarrama Canal, between the Gasco dam and Las Rozas, have remains of the original work, several aqueducts to channel the water from the streams and the dam wall, a valuable set of Spanish civil engineering from the century XVIII.

Translated by Google •

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6

11.1 km

Tower of the Lodones

Highlight • Castle

Icon of the city of Torrelodones and appreciated by many when passing through the A-6 motorway. The current tower is a restoration, while very little remains of the original. The construction dates back to the 10th century when the area was under the command of the Caliphate of Cordoba and after being abandoned for centuries, it was rebuilt in 1930.

Translated by Google •

Tip by

B

11.5 km

End point

Bus stop

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Way Types & Surfaces

Way Types

5.65 km

3.80 km

1.27 km

790 m

Surfaces

8.24 km

1.25 km

749 m

657 m

524 m

< 100 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (860 m)

Lowest point (700 m)

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Weather

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Thursday 7 May

14°C

7°C

23 %

Additional weather tips

Max wind speed: 8.0 km/h

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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