What are the Shannon Callows?
For a few weeks each summer the Shannon Callows are a swaying sea of hay; for much of the rest of the year the river is over the land. They run along the Shannon between Athlone in County Westmeath, where the river leaves Lough Ree, through County Offaly to Portumna in County Galway, where it enters Lough Derg. The name comes from the Irish caladh, “flood-meadow,” and it fits: the shallow gradient means the ground floods in winter and spring, then bakes gold by late summer. Because that soft, water-logged land has always defeated intensive farming, it never went the way of most Irish grassland.
The callows are a Special Area of Conservation covering about 59 sq km, and the Irish Wildlife Trust owns a reserve on Bullock Island within them. What draws people is the birdlife: this is one of the largest concentrations of breeding waders in these islands, and the meadows hold roughly 80% of Ireland’s whinchat.
Seasonal rhythms and wildlife
Your visit changes completely with the calendar.
- Spring (March–May): as the water pulls back, breeding waders take the damp sward. Look for lapwing, redshank, curlew, common sandpiper, black-tailed godwit and golden plover, with cuckoo-flower and marsh marigold coming through underfoot.
- Summer (June–August): the floodplain dries out and the hay is cut. These are the months for walking the tractor tracks. Early mornings often bring mist over the flat ground, and butterflies and dragonflies are busy.
- Autumn (September–October): the callows become a stop-over for migrating wildfowl. Wigeon arrive in numbers, followed by golden plover and the first whooper swans.
- Winter (November–April): heavy rain and river flow submerge much of the meadow, Bullock Island included. Foot access closes, but the surrounding roads give excellent views of large flocks of black-tailed godwit, golden plover and whooper swans.
Beyond the birds, otters are regular along the Shannon edges, with fox and American mink in the taller grass. The less-flooded higher ground carries a mix of clover, creeping buttercup, water mint, meadowsweet and marsh bedstraw.
Bullock Island and the corncrake
Bullock Island sits within the callows as an Irish Wildlife Trust reserve. It vanishes under the winter floods and re-emerges in summer as hay. It was one of the last refuges of the corncrake, a bird that has collapsed across Europe as farming modernised, and for years the callows were among its strongest Irish sites.
That story has turned. Early-summer flooding now comes at the wrong time for nesting birds and has stopped the corncrakes breeding here; the corncrake is often described as the first bird driven out of the Shannon system by climate change. It is the honest thing to say before you come listening for one: the rasping call the callows were famous for has largely gone silent. Where farmers and conservationists still work a late, strip mowing regime, it is as much to protect the waders and what corncrakes may pass through as to guarantee a brood. During the April–July breeding season, keep out of the marked conservation zones.
Getting there and access
Explore from a few key points along the river.
- By car: from Athlone, take the N6 west, then the N62 south to the bridge at Shannonbridge and follow signs for the callows; or turn onto the R357 for Banagher. A car is really the only practical way in. A new walkway at Shannonbridge Urban Plaza and the Shannon Callows reserve, funded in 2024, has improved access on the Shannonbridge side.
- Parking: a free car park at Shannon Harbour reaches the main tractor tracks, with a smaller roadside area near Banagher for anyone approaching from the south.
- Seasonal access: foot access along the tracks runs roughly May to September. Outside that, the ground is waterlogged and unsafe, so view the callows from the road network instead.
Tips for visitors
- Bring: waterproof boots, since the tracks stay soft even in summer, plus binoculars and a field guide.
- Dogs: keep them leashed year-round and well away from nesting areas in the April–July season.
- Cycling: mountain bikes can use the wider tracks, but stay on the designated routes to protect the wetland soil.
- Safety: there is no visitor centre, though panels at the main entrances explain the habitat. Heed flood warnings; water can rise fast after heavy rain.
Nearby attractions
- Banagher – a riverside town with a working marina, where you can also hire a boat to explore the Shannon.
- Clonmacnoise – one of Ireland’s most important early-medieval monastic sites, on the Shannon a short drive north and about 25 minutes from Banagher.
- Lough Boora – a former peat landscape turned wildlife park, with walking and cycling trails.
Come at first light in early summer, when the mist is still lifting off the floodplain and the waders are loudest. The callows reward patience and a slow eye more than a checklist.