The Worm Hole (Redbull Cliff Diving venue)
Whether or not you believe in the legend, the worm hole is definitely worth exploring. It’s an amazing sight to see. It’s a natural phenomenon that formed in the limestone cliffs south of Dun Aonghasa which make for an impressive backdrop, and it’s said to be about 150 feet deep and 50 feet wide. These natural pools are perfectly rectangular shaped and flow into the sea at the bottom of cliffs.
Walk east along the cliffs from Dun Aonghasa, or more easily by following the signs from the village of Gort na gCapall.
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Inis Mor is the ideal place to tour on a bike for groups of people. Aran Bike Hire can accommodate groups of people that want to hire bikes. Aran Bike Hire is an experienced company when it comes to dealing with tour groups and has a wide range of bikes to suit the needs of any age group.
If staying overnight on the Island, we suggest you look at www. aranislands.ie for detailed information for where to eat, ferry information, accommodation, and nighttime activities on the Island. Furthermore, Aran Bike Hire also recommends a newly opened Camping and Glamping establishment offering a unique natural experience for visitors.
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This impressive cliff side ruin on the southern side of the island, like Dun Aonghas, is guarded by natural defenses and by a Cheavaux – de – frise.
The Black Fort whilst not as popular as Dun Aonghas has a similarly impressive presence
Map & Directions

Spar Shop & Supermarket
Spar supermarket is located in the village which is your first stop en route to the fort and the cliffs.

The Seal Colony
The Seal Colony is one of the most popular attractions on Inis Mor Island. It is located on the coastal road 10 minutes cycle before Kilmurvey beach. The advantage of cycling here is that you can meander and be at one with nature.
On a good day, in this natural habitat with a favorable tide, you will come across numerous seals bathing. The scene is enchanting. Adjacent to the seal colony is a small lake that has wild swans, ducks lurking in the reeds as well as many rare birds. This is a must-see for bird watchers.
The seal colony is located on the coastal road, around 15 minutes cycle from Aran Islands Bike Hire
Dun Aonghasa
The fort of Dun Aonghasa is accessible by bicycle. map
The wormhole is one of the many hidden jewels on the island accessible by bike.
Dun Aonghasa is a prehistoric fortress located on the edge of a cliff on the Aran Islands, located off the west coast of Ireland.
Dun Aonghasa is a prehistoric fortress located on the edge of a cliff on the Aran Islands. It was built in the early Iron Age and overlooks the Atlantic Ocean. The original fortification was probably made of earth and stone, but it has been rebuilt and expanded over time. The fort is now home to a number of goats that live among the ruins.
It is thought to have been constructed in the late Bronze Age or early Iron Age, and may have been used as a ceremonial or ritual center. The fortifications consist of a series of drystone walls that enclose an area measuring about 60 meters by 30 meters.
The site has been excavated several times, and artifacts including pottery fragments and animal bones have been found.
The Aran Islands are famous for their prehistoric ruins, which include Dun Aonghasa as well as other structures such as Dún Chonchúir and Dún Eochla.
Map & Directions from Aran Bike Hire to Dun Aonghasa
Getting to Dun Aonghasa (Dún Aonghasa) fort from Kilronan Village by bike is a scenic journey that allows you to enjoy the natural beauty of Inishmore, the largest of the Aran Islands. Here’s how you can make the trip:
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- Begin your journey at Kilronan, the main village on Inishmore. Remember the main Village of Kilronan conveniently has the following: A Tourism Information Center, A Spar Supermarket, Three pubs, A restaurant and a Cafe.
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- The route to Dun Aonghasa is quite straightforward. You’ll be heading mostly west.
- Follow the main road that leads out of the village. This road starts at the Aran Sweater Market. The main Road is signposted. Follow the Green signs in order to stay on the flat coastal road which goes past The Seal Colony. Follow the Red signs if you wish to take the hill route to Dun Aonghasa.
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- The island is known for its scenic beauty, so make sure to take in the views as you ride. You’ll pass traditional Irish cottages, dry stone walls, monuments, churches, Celtic sights, a Goats Cheese Factory, secret beaches, Puffing Holes, Seal Colony, Kilmurvey Beach, and you will see some livestock grazing. You will also be in constant view of the Sea, and there are clear views of Connemara in the background.
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- There are a couple of minor roads that lead off the main road, but keep following the signs for Dun Aonghasa. In the event that you do take a detour, don’t stress!.
- The distance is about 6 km (4 miles), so it’s not a very long ride, but it’s always good to keep a leisurely pace to enjoy the surroundings.
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- Once you arrive, there will be a place to lock up your bike.
- Note that there’s a bit of a walk from the bike parking area to the actual fort. The path is uphill, but it’s well-maintained and not too strenuous.
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- Bring water and snacks.
- Wear appropriate clothing and sunscreen, as the weather can change and there’s not much shade on the route.
- Be mindful of the time, especially if you need to return the bike or catch a ferry.
Remember, the journey is part of the experience, so take your time and enjoy the unique landscape of the Aran Islands!
COMMON FAQ FOR GETTING TO DUN AONGHASA
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- It typically takes around 30-45 minutes, depending on your pace.
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- Yes, the route is straightforward with clear signage.
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- Yes, there are several bike rental shops in the village.
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- Rates vary, but you can expect to pay around €10-€20 per day.
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- It’s a good idea during peak tourist seasons, but not always necessary.
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- The route is relatively flat with a gentle incline closer to the fort.
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- Yes, there are designated areas to secure your bike.
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- Yes, but ensure they are comfortable with longer distances and always wear helmets.
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- Water, snacks, sunscreen, a map, and a camera for photos.
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- A standard road or hybrid bike is suitable for the terrain.
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- Yes, you can bring bikes on the ferry, usually for an extra charge.
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- There are a few spots, but it’s best to bring necessities with you.
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- Some rental shops offer assistance. It’s wise to have a contact number just in case.
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- Yes, the route is popular and manageable for cyclists of all levels.
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- They typically open around 9 am and close around 6 pm, but times can vary.
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- It’s highly recommended for safety, though not legally required.
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- Yes, but be mindful of shorter days and changing weather conditions in winter.
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- Yes, several companies offer guided cycling tours.
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- Allocate at least half a day to enjoy the ride and explore the site without rush.
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- Yes, there’s a small fee for entry to the fort.
Remember to check the latest information and local advice as details can change. Enjoy your bike ride to Dun Aonghasa!
Kilmurvey Beach
Kilmurvey Beach is located 20 minutes cycle from Kilronan Village. It is accessible via the main road and the coastal road. It is another 10 minutes before Dun Aonghasa.
The beach is particularly popular in the summer months with people swimming. It has turquoise water and stunning views of Connemara as well as the rest of the island.
The beach is also located just stones throw away from Dun Aonghasa which is clearly visible on the hill. It is also where you turn off to visit the Worm Hole.
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Kilmurvey beach is a popular gem on the Aran Islands because of its Blue Flag status and beautifully clear water.
It is located on Inishmore, which is the largest of the Aran Islands. The beach is a great spot for swimming, sunbathing, and surfing.
Just make your way from Aran Bike Hire up to Spar super Market. Turn right and make your up to Joe Wattie’s pub…. If you are looking for a flat surface, turn right and make your way to Kilmurvey Beach along the coastal road. This takes you past St. Ciaran’s Monastery (Teampall Chiarain), and the popular Seal Colony. You will see lots of fields with intricate stone walls, Ponies, goats, sheep cows and, pass the Goats cheese factory, and lots of surprises along the way.

The Black Fort
Spar supermarket is located in the village which is your first stop en route to the fort and the cliffs.

Welcome to Aran Islands Bike Hire on Inis Mor Island
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Inis Mór (Inishmore) – things to see & do
Place to visit on Inishmore
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Renting a bike and cycling to Dun Aonghasa is one of the most popular cycles in Ireland. A gentle ride takes around 40 minutes in some of the best scenery in the world.
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The Friendliest Pub On The Island.
Visit Joe Watty’s Pub -
You can contact the Inishmore Tourist office<br />at +353 (0)99 61263
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One of the most famous attractions on the island is the well preserved stone fort of Dun Aonghasa which is a semicircular shape and is at the edge of a cliff-side offering excellent defence to its ancient armies.
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A natural rock formation and site of the 4th stop in the 2012 Red Bull cliff diving world series on August 4th. MORE
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Located on the southern cliffs of Inis Mor this is thought to be the oldest of the forts on Aran.
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The smallest fort on the island but it is excellently preserved and includes an inner citadel and outer defensive wall of stronger construction than any of the other forts.
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Named in English as Arkin’s Castle, it was built in 1587. It was later occupied by Oliver Cromwell’s troops who plundered several monuments from around the island in order to repair it.
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Ruins of an ancient church which is one of the smallest in the world measuring just 10.75ft x 7ft.
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Small pre- Romanesque church with an early cross, a holy well and the remains of an enclosing castle.
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The only perfect clochan (ancient dwelling) on the Aran Islands. It is unusual in that it has an oval outline but a rectangular interior.