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Spain
Castellón
els Ports
La Pobla De Benifassà

Portell de l'Infern - Ulldecona Reservoir Trail

Hard

4.5

(13)

81

hikers

Portell de l'Infern - Ulldecona Reservoir Trail

05:39

18.1km

660m

Hiking

Hike the difficult 11.2-mile Portell de l'Infern - Ulldecona Reservoir Trail in Tinença de Benifassà Natural Park.

Last updated: February 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc Natural de la Tinença de Benifassà

Waypoints

A

Start point

Parking

Get Directions

1

3.64 km

Ronyosa Narrows

Highlight (Segment) • Gorge

When the path enters the Barranc de la Ronyosa, a passage opens between the Mola del Ferri to the north and the Mola de Magraner to the south, narrowing noticeably. …

Translated by Google •

Tip by

2

6.37 km

Portell de l'Infern

Highlight • Gorge

You can get there with children. It is one of the most emblematic sites of the Tenença de Benifassà.
Route info: gandoosdesdearriba.wordpress.com/2020/12/07/sendería-con-ninos-en-la-tinenca-de-benifassa-el-portell-de-linfern

Translated by Google •

Tip by

3

7.43 km

Cave of the Air

Highlight • Cave

At the Portell del Infern pass, you have to look for a path that goes to the left of the path to visit the Cova del Aire, another of the natural wonders of La Tinença.

Translated by Google •

Tip by

4

15.3 km

Ulldecona Reservoir

Highlight • Lake

It is at the confluence of four ravines, the Fou ravine (or Sénia river), the Teulatí ravine, the Tenalla ravine and the Pobla ravine (or green river). It supplies water …

Translated by Google •

Tip by

B

18.1 km

End point

Parking

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Way Types & Surfaces

Way Types

10.2 km

7.82 km

< 100 m

< 100 m

Surfaces

16.7 km

1.35 km

< 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.

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Weather

Powered by Foreca

Saturday 30 May

29°C

16°C

16 %

Additional weather tips

Max wind speed: 9.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

What is the overall difficulty of the Portell de l'Infern - Ulldecona Reservoir Trail?

This trail is rated as difficult, covering approximately 18 km with an elevation gain of about 662 meters. While the full route is challenging, some shorter loops around the Ulldecona Reservoir are considered easier and suitable for most fitness levels. Routes that include the Portell de l'Infern, especially those extending to the Salt de Robert waterfall, are generally harder due to their length and significant elevation.

What kind of terrain can I expect on this hike?

You'll encounter a diverse landscape, starting with wide paths and beautiful pine forests. As you progress, the path can become narrower, leading to areas with impressive vaulted rock walls. Expect rocky or uneven sections, which may be muddy after rain. From higher vantage points, the trail offers spectacular panoramic views of deep valleys and the expansive Tinença area.

Are there any notable landmarks or viewpoints along the route?

Absolutely! Key highlights include the legendary passage of Portell de l'Infern, the scenic Ulldecona Reservoir with its emerald or turquoise waters, and the dramatic Ronyosa Narrows. You might also pass the Cave of the Air, the Font del Teix (a permanent water source), and the ruins of Mas del Pixón.

Where can I park to access the Portell de l'Infern - Ulldecona Reservoir Trail?

While specific parking areas aren't detailed, many routes around the Ulldecona Reservoir or starting from nearby villages like Fredes offer access. It's advisable to check local maps or trail guides for designated parking spots near common trailheads, especially if you plan to start from Fredes for the Portell de l'Infern - Ulldecona Reservoir Trail.

Is the trail dog-friendly?

The Tinença de Benifassà Natural Park generally allows dogs, but they must be kept on a leash to protect local wildlife and ensure the safety of other hikers. Always ensure your dog is well-behaved and that you clean up after them.

Do I need a permit or pay an entrance fee to hike in Tinença de Benifassà Natural Park?

Generally, there are no entrance fees or specific permits required for hiking the trails within the Tinença de Benifassà Natural Park, including the Portell de l'Infern - Ulldecona Reservoir Trail. However, always respect park regulations, stay on marked paths, and practice Leave No Trace principles.

What is the best time of year to hike this trail?

Spring and autumn are generally the best seasons for hiking this trail. The weather is milder, and the natural scenery is vibrant. Summer can be very hot, especially in the exposed sections, while winter might bring colder temperatures and potentially muddy conditions after rain.

Does this trail intersect with other well-known paths?

Yes, the route incorporates sections of several other paths. You'll find yourself on parts of the Fredes – Pantà d'Ulldecona pel Portell de l'Infern, Senda Portell de l'Infern, and Camí de la Fou trails. These intersections are typically well-signposted with red marks bearing the natural park's logo or white and yellow PR marks.

Is there a permanent water source available on the trail?

Yes, the trail often passes by the Font del Teix, which is noted as a permanent water source. However, it's always recommended to carry sufficient water for your entire hike, as natural sources can be unreliable or require purification.

Can families with children hike parts of this trail?

While the full Portell de l'Infern - Ulldecona Reservoir Trail is difficult, a linear route to Portell de l'Infern starting from Fredes is rated as medium difficulty and suitable for children aged 5-6. Be aware that the return ascent might be challenging for younger children. Shorter, easier loops around the Ulldecona Reservoir are also an option for families.

What wildlife might I encounter on the trail?

The Tinença de Benifassà Natural Park is known for its rich biodiversity. Keep an eye on the skies, as you might have the opportunity to spot raptors like vultures and eagles soaring above the landscape, adding to the natural allure of the experience.

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Trail Reviews

L. van Es
January 4, 2022, Loop Salt de Robert, Port de l'infern

First part it's an easy road, then a steep winding path through the pines but the view is well worth it. Going down on a rocky path.

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