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Spain
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Lozoya Somosierra
Miraflores De La Sierra

San Blas Hollow Loop

Hard

11

runners

San Blas Hollow Loop

01:32

12.1km

310m

Running

Jog the difficult 7.5-mile San Blas Hollow Loop in Cuenca Alta del Manzanares Regional Park, gaining 1029 feet in 1h 32m.

Last updated: February 26, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Parque Nacional de la Sierra de Guadarrama

Waypoints

A

Start point

Get Directions

1

3.45 km

Hoya de San Blas

Highlight • Gorge

This natural enclave is located in the municipalities of Manzanares el Real and Soto del Real. Beautiful views.

Translated by Google •

Tip by

2

11.9 km

San Blas Hermitage

Highlight • Religious Site

The Hermitage of San Blas, more than a hermitage, is a small stone construction that houses the image of San Blas.
It is located on a promontory surrounded by large granite stones and from its position there is a viewpoint with beautiful views of places as characteristic as La Pedriza, Cabezas de Hierro, the Santillana reservoir and in the distance, Madrid with the 4 towers ( almost 5).
More at bigjoe.es/ruta-mtb-miraflores-guadalix-navalafuente

Translated by Google •

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B

12.1 km

End point

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Way Types & Surfaces

Way Types

11.1 km

958 m

Surfaces

10.6 km

997 m

534 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 (1,320 m)

Lowest point (1,030 m)

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Weather

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Tuesday 26 May

32°C

16°C

0 %

Additional weather tips

Max wind speed: 13.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

How long does it typically take to jog the San Blas Hollow Loop?

The San Blas Hollow Loop is approximately 12.1 kilometers (7.5 miles) long. For an average jogger, it typically takes around 1 hour and 32 minutes to complete the entire loop.

What is the difficulty level of this jogging route?

This route is considered difficult. With an elevation gain of over 313 meters (1,027 feet) and varied terrain, it presents a significant challenge suitable for experienced joggers looking for a demanding workout.

Is the San Blas Hollow Loop suitable for beginners?

Given its 'difficult' rating and substantial elevation gain, this loop is generally not recommended for beginners. It's best suited for experienced joggers who are comfortable with challenging terrain and longer distances.

What are the main points of interest along the route?

Along the San Blas Hollow Loop, you'll encounter notable features such as the Hoya de San Blas, a striking gorge, and the historic San Blas Hermitage, a religious building offering a cultural highlight.

Does the trail intersect with other paths?

Yes, the San Blas Hollow Loop shares sections with several other trails. Notably, it covers 93% of 'El Hueco de San Blas' and 91% of 'Dehesas de Soto - El Hueco de San Blas'. Smaller portions also overlap with 'De Valencia a Lisboa (Etapa desde Bustarviejo a Manzanares El Real)', 'Estación FC de Miraflores - La Camorza', and 'Camino de la Peña del Madroño'.

Where can I park to access the trailhead?

While specific parking details for this exact loop are not provided, access points for trails within the Cuenca Alta del Manzanares Regional Park typically include designated parking areas near villages or trailheads. It's advisable to check local maps or park information for the most convenient and official parking options near the starting point of the loop, often close to the San Blas Hermitage.

Are dogs allowed on the San Blas Hollow Loop?

As part of the Cuenca Alta del Manzanares Regional Park, dogs are generally permitted on trails. However, they must be kept on a leash at all times to protect wildlife and ensure the safety of other trail users. Please remember to clean up after your pet.

What is the best time of year to jog this route?

The best time to jog the San Blas Hollow Loop is typically during spring (April-June) and autumn (September-November). During these seasons, the weather is usually milder, offering more comfortable temperatures for jogging and enjoying the natural surroundings. Summer can be very hot, and winter may bring colder temperatures and potentially slippery conditions.

Are there any permits or entrance fees required for this trail?

The San Blas Hollow Loop is located within the Cuenca Alta del Manzanares Regional Park. Generally, there are no entrance fees for accessing the park's trails. However, certain activities or specific areas within the park might require permits. It's always a good idea to check the official park website for any current regulations or permit requirements before your visit.

What kind of terrain can I expect on the San Blas Hollow Loop?

Given its 'difficult' rating and location within a regional park, you can expect varied terrain. This likely includes a mix of dirt paths, rocky sections, and potentially some steeper ascents and descents. Proper trail running shoes with good grip are highly recommended.

Is this a family-friendly route?

Due to its 'difficult' rating, significant distance, and elevation gain, the San Blas Hollow Loop is generally not considered family-friendly for younger children or those unaccustomed to strenuous activity. It's better suited for adults and older, experienced teenagers.

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