4.5
(630)
5,731
hikers
65
hikes
Hiking in Complexo Intermareal Umia - O Grove, A Lanzad offers diverse terrain across a protected natural area on the southern bank of the Ría de Arousa. The region features a mosaic of terrestrial and marine environments, including the Umia River Estuary, extensive dune systems, and coastal lagoons. Hikers can explore rugged cliffs, secluded beaches, and the highest point of O Grove, Mount Siradella, which provides panoramic views. This area is recognized for its ecological importance, encompassing wetlands and intertidal…
Last updated: May 10, 2026
4.7
(40)
181
hikers
5.27km
01:21
20m
20m
Explore the easy 3.3-mile (5.3 km) Isla de Arousa – Carreirón Natural Park trail, featuring beaches, forests, and birdwatching opportunities
4.6
(28)
104
hikers
10.2km
02:40
70m
80m
Moderate hike. Good fitness required. Mostly accessible paths. Sure-footedness required.

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4.8
(17)
146
hikers
13.5km
03:45
260m
260m
Hike the Isla de Ons – path via Mirador de Fedorentos and Punta do Centolo for moderate coastal views and unique natural features.
4.8
(8)
40
hikers
19.6km
05:09
170m
170m
Hike the challenging 12.2-mile O Grobe – Black Stones Route, gaining 559 feet with coastal views and unique rock formations.
5.0
(3)
10
hikers
4.56km
01:12
40m
40m
Enjoy an easy 2.8-mile hike on Isla de Toja, featuring pine forests, estuary views, and the unique Shell Church, perfect for a relaxed strol
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Popular around Complexo Intermareal Umia -O Grove, A Lanzad
12 hiking gems throughout Spain
Running Trails in Complexo Intermareal Umia -O Grove, A Lanzad
Road Cycling Routes in Complexo Intermareal Umia -O Grove, A Lanzad
Cycling in Complexo Intermareal Umia -O Grove, A Lanzad
MTB Trails in Complexo Intermareal Umia -O Grove, A Lanzad
Gravel biking in Complexo Intermareal Umia -O Grove, A Lanzad
When the sun shines and the sea glows in different colors, it's a real dream.
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Interesting rock formations, bizarre coastal landscape and a direct view of large cannons.
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Great, extremely interesting path along various rock formations with wonderful views of the Atlantic.
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Panoramic trail with great views and very easy to walk
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The famous shell church was formerly dedicated to San Sebastián, but after the reform, the Virgen del Carmen was substituted as the main image. This chapel venerates the famous San Caralampio III, a 19th-century martyr who is the patron saint of skin diseases. The patronage and veneration of this special place, the thermal waters of the thermal baths on the island of A Toxa, are used as a skin-healing therapy, so people have been going to this chapel since ancient times to ask for the protection of this saint. Why is the church covered with scallop shells? It is the only chapel in the world covered with scallop shells. Originally built in 1909, this was the result of chance. The facade, where the altar is located, faces south, and rain constantly beats down on the walls, creating dampness and damaging the structure. At the end of the 1940s, Raimundo Riestra Calderón, II Marqués de Riestra, summoned a mason to offer a solution to this problem, which had dragged on for almost four decades. The man informed him that a traditional method of preventing water infiltration was to cover scallops with scales all over their surfaces, allowing water to slide down them without wetting the interior. He thought the idea was great and accepted the proposal. When the facade was finished, the Marquis liked it so much that, as administrator of the spa, he ordered the entire church to be covered with shells. It was a slow process that took several years, beginning in the late 1940s and ending in the early 1950s. And one last detail: If you were transported back in time 120 years to the same point where you are now, you wouldn't walk on land, but would float in the water along with the church. Almost the entire garden was an old salt mine, lost in the distant past. It was filled in at the beginning of the 20th century.
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A particularly striking rock formation not far from the beach. Easily accessible.
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Especially when the sky is cloudy, there is a unique atmosphere here
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The Complexo Intermareal Umia - O Grove, A Lanzada region offers a wide variety of hiking experiences, with over 65 trails available. These include 43 easy routes, 19 moderate paths, and 3 more challenging trails, ensuring options for all fitness levels.
Yes, the area is well-suited for family hikes. Many easy trails explore the diverse landscapes. For example, the Carreirón Natural Park Trail is an easy 3.3-mile (5.3 km) path perfect for exploring beaches and forests, offering birdwatching opportunities. Another gentle option is the La Toja Island Loop, a 2.8-mile (4.6 km) trail through a unique island landscape.
Hikers can discover a rich variety of natural features and landmarks. The region is known for its extensive dune systems, protected wetlands like the Bodeira Lagoon, and the dramatic cliffs of San Vicente do Grove. Notable points of interest include the impressive rock formations at Buraco do Inferno and the scenic Ruta das Pedras Negras, which offers coastal boardwalks. You can also visit the unique Chapel of the Shells of A Toxa on La Toja Island.
Yes, there are several circular routes to enjoy. The La Toja Island Loop is a popular easy circular trail. For a more challenging option, consider the O Grove Coastal Loop, a difficult 12.2-mile (19.6 km) route that provides extensive coastal views.
The Complexo Intermareal Umia - O Grove, A Lanzada area is beautiful year-round. However, spring and autumn offer particularly pleasant temperatures for hiking, with less crowded trails and excellent opportunities for birdwatching during migration seasons. Summer is also popular, especially for coastal walks, but can be warmer.
The region offers spectacular and varied views. From coastal trails, you'll enjoy panoramic vistas of the Ría de Arousa, the Atlantic Ocean, and the A Lanzada isthmus. Higher points like Mount Siradella provide expansive views over the entire complex, including the islands. Many routes also feature views of protected wetlands, dune systems, and rugged cliffs.
While specific regulations can vary, generally, dogs are permitted on many trails within the Complexo Intermareal Umia - O Grove, A Lanzada, especially on public paths. However, as it's a protected natural area (ZEPA, Ramsar site), it's always recommended to keep dogs on a leash to protect local wildlife, particularly birds, and to respect other hikers. Please check local signage for any specific restrictions in certain zones.
Yes, the region is dotted with excellent viewpoints. Mount Siradella, the highest point in O Grove, offers spectacular panoramic views of the Ría de Arousa, A Lanzada isthmus, and the Atlantic Islands. Many coastal trails, such as sections of the Black Stones Route – O Grove Peninsula, also provide stunning ocean vistas from the cliffs. For more information on specific viewpoints, you can visit visitogrove.com.
As a Special Protection Area for Birds (ZEPA) and a Ramsar site, the Complexo Intermareal Umia - O Grove, A Lanzada is exceptional for birdwatching. Hikers can observe numerous species of resident and migratory aquatic birds, including waders, ducks, and herons, especially around the Umia River Estuary and Bodeira Lagoon. Otters have also been sighted in the lagoon. The diverse habitats support a variety of other local fauna.
The area is highly rated by the komoot community, with an average score of 4.6 stars from over 230 reviews. Hikers frequently praise the diverse terrain, from sandy beaches and dunes to rugged cliffs and wetlands, and the stunning coastal views. The well-maintained paths and the rich opportunities for birdwatching and wildlife observation are also commonly highlighted.
Public transport options exist to reach the general area of Complexo Intermareal Umia - O Grove, A Lanzada, primarily through bus services connecting to O Grove and nearby towns. However, access to specific trailheads might require local taxis or a short walk from bus stops. It's advisable to check local bus schedules and routes in advance for the most convenient access to your chosen starting point.
Yes, parking facilities are generally available at or near popular trailheads and points of interest throughout the Complexo Intermareal Umia - O Grove, A Lanzada. Coastal areas and major attractions often have designated parking lots. However, during peak season, these can fill up quickly, so arriving early is recommended.


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