Located in northwest Ireland, County Donegal is a natural oasis revered for its rugged coastlines, glistening lakes, and boundless unspoiled splendor. The mountain of Errigal looms over a region whose inland terrain features a trove of rivers, glens, and sprawling valleys. Several epic hiking trails crisscross the county, including Muckross Head and Glencolumbkille Cliff in the far west, and the Inishowen Head Loop, a five-mile coastal trek that brings you along bog roads and past a World War II lookout tower. County Donegal’s vast coastline, part of the Wild Atlantic Way, is a road tripper’s paradise, full of rocky headlands and soaring sea cliffs that rise from remote beaches and bays.

There are dozens of cities and towns in County Donegal, many of which contain just a handful of residences. In the county’s namesake town, colorful homes line streets and canals and the large town square is surrounded by shops and pubs. Letterkenny, the county’s largest town, welcomes visitors to its towering neo-Gothic Cathedral of St. Eunan and St. Columba and the nearby 19th-century Glenveagh Castle. This region is one of the last true strongholds of the Irish language, with 30,000 native speakers still residing here. Home to the medieval Donegal Castle, the 7th-century hillfort at Grianan of Aileach, and many folk festivals and thriving Irish traditions, County Donegal is rich in cultural and natural wonders alike.

Spring, summer, and early fall are full of sunny days and warmer temperatures perfect for traversing County Donegal’s landscapes. Temperatures dip in winter, so it may be best to pack an extra layer or two. It rains throughout the year, regardless of the season, making waterproof clothing essential.

Many of County Donegal’s annual events focus on Irish traditions and customs. The Atlantic Irish Fest is a five-day celebration held in January along the coast and features live music and cultural talks about Ireland’s history. In July, the Earagail Arts Festival showcases local performers, artists, and speakers at venues throughout the county. The town of Ballyshannon hosts a festival dedicated to folk and traditional music in early August.

Glenveagh National Park

Glenveagh National Park near Letterkenny is a lush green expanse of oak forests, lakes, waterfalls, and rugged mountains. The park spans nearly 4,000 acres, with a number of walking trails to explore. Situated within the park is the picturesque 19th-century Glenveagh Castle. Take a guided tour to peruse its interior, which is decked out in its original furnishings.

Slieve League Cliffs

Rising nearly 2,000 feet from the sea about an hour’s drive west from Donegal, the cliffs at Slieve League are some of the highest in Ireland. Trails meander along the clifftops, including a hiking path that leads to the top of Slieve League, which provides sweeping views of the Atlantic Ocean, Donegal Bay, and the Sligo Mountains.

Arranmore Island

Make the 20-minute ferry hop across from Burtonport, midway down the west coast, and wander across its tranquil beach. The jagged cliffs are home to fulmars, while the waters below teem with gurnard and mackerel. Electric bikes are available to hire, and you can cycle past resident sheep up to whitewashed Arranmore Lighthouse.