Routes

Planner

Features

Updates

App

Get the App

Routes

Hiking trails & Routes

Portugal

Lisbon

Cascais e Estoril e Estoril e Estoril

Boca do Inferno (Hell’s Mouth) Rock Arch – Cascais Citadel loop from Cascais

Routes

Hiking trails & Routes

Portugal

Lisbon

Cascais e Estoril e Estoril e Estoril

Boca do Inferno (Hell’s Mouth) Rock Arch – Cascais Citadel loop from Cascais

Moderate

4.6

(47)

658

hikers

Boca do Inferno (Hell’s Mouth) Rock Arch – Cascais Citadel loop from Cascais

02:12

8.29km

80m

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: March 16, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parque Natural de Sintra-Cascais

Waypoints

Start point

Bus stop

Get Directions

1.31 km

Boca do Inferno (Hell’s Mouth) Rock Arch

Highlight • Natural Monument

The Boca do Inferno (hell's mouth) is a submerged by the sea steep coast on the Atlantic Ocean. It is located about two kilometers west of Cascais and can be reached on foot or by city bus.

Translated by Google •

Tip by

1.86 km

View of the rocky coast near Boca do Inferno

Highlight • Viewpoint

A bit away from the Boca do Inferno is this beautiful stretch of coastline. Who likes it nice and quiet should take a little break.

Translated by Google •

Tip by

2.26 km

Condes de Castro Guimarães Museum

Highlight • Castle

Romantic style palace from 1900 with paintings, antique artefacts and old library.

Translated by Google •

Tip by

2.96 km

Cascais Citadel

Highlight • Castle

The Cidadela de Cascais (Cascais Citadel) is a fascinating fortress complex that guards the marina and the bay. It is a unique mix of military history and modern art.
Here …

Tip by

3.62 km

View of Cascais

Highlight • Viewpoint

The View: A Living Postcard
The bay offers an iconic mix of a traditional fishing village and the aristocratic "Portuguese Riviera." You will see colorful fishing boats anchored in calm …

Tip by

4.24 km

5th of October Square, Cascais Town Hall and Statue of Dom Pedro I

Highlight • Monument

Cascais City Hall (Câmara Municipal de Cascais) is located in the city center, on Praça 5 de Outubro, an emblematic square that also houses the statue of King Pedro I. …

Translated by Google •

Tip by

4.26 km

Cascais Town Museum (Museu da Vila)

Highlight • Historical Site

The city museum is located directly opposite the port of Cascais and has a great exterior facade

Translated by Google •

Tip by

4.76 km

Cascais Citadel (Fortress of Our Lady of Light)

Highlight • Castle

The Cidadela de Cascais is a 15th-century fortress that guarded the western end of the Tejo estuary and the small fishing port of Cascais. Today, the fortress dominates the exclusive …

Translated by Google •

Tip by

8.29 km

End point

Bus stop

Way Types & Surfaces

Way Types

3.31 km

2.47 km

2.31 km

148 m

< 100 m

Surfaces

3.76 km

3.36 km

1.09 km

< 100 m

Elevation

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

Weather

Saturday 9 May

18°C

12°C

-- %

Additional weather tips

Max wind speed: -- km/h

to get more detailed weather forecasts along your route

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

Navigate

Send to Phone

Save

Edit route

Download GPX

Move start point

Embed on a website

Report an Issue

Nearby routes

Moderate

4.6

1,638

Torre de Belém from Rua Augusta — route in Lisboa

04:55h

19.2km

70m

Moderate

4.6

487

Cabo da Roca and Adraga Beach Circular Trail

02:55h

9.54km

270m

Easy

4.6

280

Walking tour of Lisbon's tourist attractions

01:59h

7.18km

120m

Moderate

4.4

286

Castelo dos Mouros e Palácio Nacional da Pena — circular route PR2 SNT in Sintra

02:09h

6.61km

300m

Easy

4.3

232

Trilho Azul — circular route Parque Florestal de Monsanto

01:58h

6.93km

160m

Moderate

4.8

234

From Praia Grande to Praia da Ursa — route in Parque Natural Sintra-Cascais

03:08h

10.8km

270m

Easy

4.6

264

Biodiversity Route

01:25h

5.54km

20m

Moderate

4.5

142

Rio da Mula e Memorial dos Soldados — circular route PR 6 SNT in Parque Natural Sintra-Cascais

03:21h

10.8km

400m

Easy

4.8

157

In the surroundings of the Santuário de Peninha — circular route PR 10 SNT in the Parque Natural Sintra-Cascais

01:19h

4.74km

90m

Moderate

3.4

131

Cabo Raso Route

03:22h

13.0km

80m

Moderate

4.5

174

From Convento dos Capuchos to Barragem do Rio da Mula — circular route in Parque Natural Sintra-Cascais

02:08h

7.30km

210m

Moderate

4.4

285

From Arco da Rua Augusta to Parque Eduardo VII — route in Lisboa

02:12h

8.12km

110m

Boca do Inferno (Hell’s Mouth) Rock Arch – Cascais Citadel loop from Cascais

Boca do Inferno (Hell’s Mouth) Rock Arch

View of the rocky coast near Boca do Inferno

Condes de Castro Guimarães Museum

Cascais Citadel

View of Cascais

5th of October Square, Cascais Town Hall and Statue of Dom Pedro I

Cascais Town Museum (Museu da Vila)

Cascais Citadel (Fortress of Our Lady of Light)

Nearby routes

Sign up or log in to keep exploring this route

We value your privacy ⛰️

We value your privacy ⛰️