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River Shannon

Plizio editorial teamUpdated: Jun 2026Data Sources

River

Weather…

The River Shannon is the longest river in Ireland and the British Isles, stretching approximately 360 kilometers (224 miles) from its source to the sea. It rises at the Shannon Pot in the Cuilcagh Mountains of County Cavan and flows generally southwards, touching 11 of Ireland's 32 counties. The river expands into three major lakes—Lough Allen, Lough Ree, and Lough Derg—before reaching its 100-kilometer long estuary at Limerick City, where it meets the Atlantic Ocean. Historically, the Shannon has been a vital strategic barrier and a primary trade route, utilized by Viking raiders in the 9th century to access inland monastic sites. During the 18th and 19th centuries, it was linked to Dublin via the Grand and Royal Canals, forming the backbone of Ireland's pre-railway industrial transport system. Modern usage is dominated by leisure tourism, with the river serving as one of Europe's premier inland cruising destinations. Ecologically, the Shannon Callows are internationally significant wetlands, providing a sanctuary for rare bird species like the corncrake.

Location: Ireland, Ireland
Nearby: Ennis (31 km)

Best time to visit & climate

The most pleasant time to visit is Jun–Aug.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg °C	5	5	6	8	11	14	15	15	13	10	8	6
Rain mm	104	81	77	68	76	83	92	96	82	101	119	112

📋 Practical info

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Getting there

As the country's longest continuous waterway, it can be easily reached from numerous inland towns and major regional roads. Many visitors choose to start their relaxed journey at established public marinas or charming lakeside ports.

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Best season

Summer is by far the most popular and pleasant time for boating, recreational fishing, and walking along the scenic inland shores. Spring and autumn are significantly quieter but offer beautiful, highly atmospheric misty views.

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Terrain & paths

The surrounding natural environment alternates between broad lakesides, flat grassy riverbanks, and neatly paved town walkways. Most of the official shoreline walking paths are very highly accessible and well-maintained year-round.

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What to bring

Standard outdoor clothing suitable for the notoriously unpredictable climate is always the very best choice for visitors. If renting a boat, sturdy non-slip shoes and versatile weather-resistant layers are considered extremely helpful.

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Parking

Most of the inland towns situated along the water offer ample public parking directly near the docks or local recreational walkways. Finding a suitable spot is usually quite straightforward, even during the much busier summer months.

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Safety

Boating and other water activities require strict adherence to standard water safety precautions and wearing a life jacket at all times. Always be mindful of sudden changes in water depth and potentially hidden underwater currents.

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Time needed

While visitors can certainly enjoy a brief afternoon stroll by the water, many opt for full-day or multi-day leisurely boat rentals. The overall length of your stay will naturally depend heavily on your specific chosen activities.

Geography

Coordinates

52.66400, -8.62800

Facts

The River Shannon is 360 kilometers long from source to estuary.
Its drainage basin covers approximately one-fifth of the island of Ireland.
The source, Shannon Pot, is a karst spring in the Cuilcagh Mountains.
Viking settlers established a permanent base at Limerick on the river in 922 AD.
The Grand Canal linked the Shannon to the Liffey in Dublin in 1804.
The Shannon Callows support 10% of the world's population of corncrakes.

Explore nearby

Notable places around

Limerick<1 km · WExplore →

Cratloe10 km · NWExplore →

Bunratty Castle13 km · WExplore →

Adare Friary15 km · SWExplore →

Shannon18 km · WExplore →

Slieve Bernagh20 km · NExplore →

Killaloe20 km · NEExplore →

Tulla25 km · NExplore →

Route planner — Car & Motorhome

Where do you start? We build the route here, with stops and country notes along the way.

Start Destination Via (optional)

Overnight stops

Vehicle

Only stops with (optional): 💧 Water ♻️ Disposal 🔌 Power 🚻 Toilets 🚿 Shower

Sights nearby

Frequently asked questions

How long is the River Shannon?

At approximately 360 kilometers, it is the longest river in Ireland.

Is the river navigable?

Yes, large parts are navigable for leisure craft and connected via canals to the Erne system.

What major towns are on the Shannon?

Important towns along the river include Athlone, Carrick-on-Shannon, and Limerick City.

Is there Viking history on the Shannon?

Yes, Vikings used the Shannon for raids and established settlements like Limerick.

Where does the river rise?

It rises at the 'Shannon Pot' in the Cuilcagh Mountains in County Cavan.

River Shannon: where is it located?

River Shannon is located in Ireland, Ireland.

River Shannon: when is the best time to visit?

The most pleasant time to visit is Jun–Aug.

River Shannon: why is it worth visiting?

The River Shannon is the longest river in Ireland and the British Isles, stretching approximately 360 kilometers (224 miles) from its source to the sea.

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