Best mountain passes around Aller, a municipality in Asturias, Spain, are situated within an impressive mountainous landscape. This region serves as a dramatic welcome to Asturias when approaching from the plains of Leon, characterized by significant mountain ranges. The area offers a blend of natural features, historical routes, and opportunities for outdoor activities. Its geography includes protected natural spaces, forests, green mountain pastures, and winding rivers.
Last updated: July 1, 2026
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Popular around Aller
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Hiking around Aller
Road Cycling Routes around Aller
MTB Trails around Aller
Running Trails around Aller
Cycling around Aller
This mountain pass, between Asturias and León, rises 1,520 meters above sea level. The ascent on both sides is spectacular, immersing you in an unforgettable mountain landscape.
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The Alto de Santo Emiliano is a classic Asturian cycling pass, located between the municipalities of Mieres and Langreo, connecting the Nalón and Caudal basins in an area with a long mining and cycling tradition. Climb Features • The summit is located at an altitude of approximately 515-519 meters, depending on the slope. • There are two main slopes: • From Langreo (Sama): • Length: 5.2 to 5.4 km • Elevation gain: ~309 m • Average gradient: 5.7% • Maximum gradient: ~7% (no double-digit ramps) • Road in good condition with a fairly constant gradient. • From Mieres (via Rioturbio): • Length: 7.1 to 7.5 km • Elevation: ~291-314 m • Average gradient: 3.9%-4.4% • Initially, a gentle 2-3% section, then a 3.5 km stretch at 5-7% with occasional ramps at 8-9%
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Normally done in descent from Puerto de La Cobertoria to the town of Santa Marina along a quiet road in good condition that offers us great views of the surroundings. We can make a stop at the Forcichave Viewpoint that we will find during the descent.
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The top of La Colladiella is a pass with very little traffic and a good firm ground. On these lost roads you can enjoy cycling pleasantly, despite its steep slopes.
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Classic Asturian mountain pass with winding and narrow roads through the typical greenery of northern Spain. It has traditionally been included in the Vuelta a España as a prelude to the mythical Angliru, but in itself it is a demanding pass for the average cyclist with its ramps of up to 7% climbing from Riosa and 12% from Pola de Lena.
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Starting point of several routes. good parking
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Beautiful little frequented port and in the shadow of the most famous.
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Among the most popular mountain passes for cycling, you'll find Alto del Cordal, known for its winding roads and inclusion in cycling events like La Vuelta a España. Another favorite is Alto de La Colladiella, which offers pleasant cycling on roads with little traffic despite its slopes. Cyclists also appreciate Alto de Santo Emiliano, a classic Asturian pass connecting the Nalón and Caudal basins.
Yes, the Via Carisa is a historically significant route that crosses the high mountain ranges of Aller and Lena. It's considered the first and main Roman road in Asturias, dating back to pre-historic times. You can explore parts of the original road and learn more about its history at the Via Carisa Interpretation Centre in La Fistieḷḷa, offering a unique 'Roman experience' amidst spectacular landscapes.
The mountain passes in Aller are set within the Central Mountain range of Asturias, offering stunning natural beauty. You'll encounter protected natural spaces, lush beech and oak forests, green mountain pastures, and winding rivers. The Aller River itself rises near the Vegarada Pass and carves impressive gorges with waterfalls and torrents, showcasing a landscape of singular beauty.
The autumn months offer a particularly magnificent experience, as the mountainsides are vibrant with color and you might hear the sound of stags rutting. However, the region is beautiful year-round for various activities, with winter bringing opportunities for skiing near San Isidro Pass.
Yes, the Alto de San Isidro is a prominent pass bordering Castilla y León and is a significant area for skiing. Aller is home to the Fuentes de Invierno Winter Ski Resort, which is the newest and most modern ski station in Asturias, making it an excellent destination for winter sports enthusiasts.
The area around Aller's mountain passes is ideal for various outdoor activities. You can find numerous routes for hiking, road cycling, and running. For hiking, explore trails like Peña Mea Summit Trail or the Marmartín River loop. Cyclists can enjoy routes such as La Cubilla Pass – Campomanes loop. For more details on routes, you can check out the Hiking around Aller, Road Cycling Routes around Aller, and Running Trails around Aller guides.
Many mountain passes in Aller offer exceptional views. For instance, the Road from Puerto de La Cobertoria to Santa Marina includes the Forcichave Viewpoint, providing great vistas of the surroundings. The ascents to passes like Alto de San Isidro also immerse you in unforgettable mountain landscapes.
The dense forests and natural spaces around Aller are home to diverse wildlife. Visitors might spot deer, wolves, foxes, wild boar, otters, and capercaillies, offering excellent opportunities for nature observation, especially in the quieter areas and during specific seasons.
While many passes in Aller are known for their challenging climbs, some sections or approaches can be more accessible. For example, the ascent to Alto de Santo Emiliano from Mieres starts with a gentle 2-3% section before becoming steeper. It's always recommended to check specific route details for difficulty levels before embarking on a trip.
Visitors frequently praise the stunning natural beauty, the challenging yet rewarding cycling routes, and the sense of tranquility found on less-trafficked roads. The historical significance of routes like the Via Carisa also adds a unique dimension to the experience, allowing for a blend of outdoor adventure and cultural exploration.
Yes, some mountain passes, such as Alto del Cordal, are noted for having good parking facilities, making them convenient starting points for various routes and activities.
Yes, the El Gumial route in Aller is particularly noted for its beautiful beech forests and mountain pastures, which are especially vibrant in autumn. The general landscape around the passes features lush beech and oak forests and green mountain pastures, providing picturesque scenery for hikers and cyclists alike.


See even more epic mountain passes by checking out these guides around Aller: