Overview
In 1989 two local farmers, Liam Egan and Patrick Headon, went to the High Court to stop a drainage scheme from wrecking Sharavogue Bog – and won. That injunction is the reason there is still a raised bog here to walk around. Sharavogue sits on the floodplain of the Little Brosna River, just south of Birr in County Offaly, and its 223 hectares hold one of Ireland’s most intact raised peat domes: about 137 hectares of uncut bog, with the rest cutover ground, wet grassland, woodland and lagg fen at the margins. Right beside it, the R492 crosses the river on a single-arch limestone bridge from the 1850s.
Set your expectations first: this is a place to look at, not a visitor attraction. There is no boardwalk like Clara Bog, no car park and no café – just open edge paths, river views and a landscape that has been left to recover.
A conservation success story
Peat began building here after the last Ice Age, forming a raised dome that survived thousands of years of light turf-cutting for fuel. The 20th century was harder on it: a large section to the north was cut mechanically in the early 1900s, and by the late 1980s a court-ordered drainage scheme threatened the rest. Egan and Headon’s injunction halted it; they later bought the freehold and set about protecting the site, and in 1998 their campaign won the International Award for Nature Conservation Merit from the Dutch Foundation for the Conservation of Irish Bogs.
Today it is a designated Special Area of Conservation (site code 000585, spanning Offaly and Tipperary), listed for active and degraded raised bog and for the fragile Rhynchosporion vegetation of its wet hollows. As part of The Living Bog LIFE project, restoration works in 2021 installed more than 400 dams across the cutover ground to raise water levels and restart the natural hydrology. The bog even claims a connection to Saint Patrick.
The bridge and the old railway
The single-arch limestone bridge that carries the R492 over the Little Brosna dates from the early 1850s – rock-faced stone and a brick-lined soffit, understated and solid in the way of mid-19th-century Irish engineering. A second single-arch bridge, built around 1858, carries the road over the line of the old Birr–Roscrea railway; both are listed for their architectural and technical interest.
That railway ran between Birr and Roscrea from 1858 until it closed in 1963, and it left a visible earthwork embankment east of the bog. Local lore recalls a runaway train there in 1910, carrying pilgrims down a steep gradient with failing brakes and sliding into the Little Brosna – with, the story goes, no one killed. The bridge and the faint trackbed are quiet reminders of that era.
Wildlife and habitat
Sharavogue supports a classic raised-bog community: carpets of Sphagnum moss, cotton-grass and bog rosemary on the wetter ground, with willow and alder in the surrounding lagg and semi-natural woodland. The damp open terrain suits wetland birds, and snipe, curlew and teal are regular visitors – the re-wetting work has improved breeding conditions for them. The waterlogged surface also acts as a carbon store and a flood buffer along the Little Brosna.
What to see and do
- Walk the bog perimeter: Low footpaths along the river and bog edge let you take in the active dome and the restored cutover, where you can pick out the small dams holding water in the lower ground.
- Photograph the bridge: The single limestone arch frames the river well in the soft light of early morning or late afternoon.
- Trace the railway earthworks: Follow the old Birr–Roscrea embankment east of the bog; the raised trackbed is still legible through the grass.
- Birdwatching: Bring binoculars for the wet grassland and open channels. Spring and early autumn are the busiest for birds.
Practical information
- Access and parking: The bog is privately owned with no facilities. Keep to the existing footpaths along the river and bog margin. Free parking is at the N52/R492 junction near the bridge.
- Getting there: From Birr, head east on the R492; the bridge and bog are just past the N52 roundabout. From Roscrea, the R492 runs straight to the site.
- What to bring: Waterproof boots – the ground is soft and uneven – plus a windproof jacket and binoculars.
- Safety: Stay on established paths. Raised-bog surfaces are unstable and can be dangerous to step on directly, and the bridge carries live traffic, so leave room for cars.
- Nearby facilities: Birr, a short drive north, has cafés, toilets and accommodation; Roscrea offers the same to the west.
Nearby attractions
- Clara Bog – another premier Offaly raised bog, with an accessible boardwalk and a visitor centre if you want the version with facilities.
- Lough Boora – a former peat landscape turned into a park of walking trails, public art and wildlife.
- Little Brosna River – follow the water downstream for quiet riverside walks and angling.
- Birr Castle – a short drive north, with historic gardens and scientific collections.
For a quiet afternoon that puts landscape history and active conservation side by side, Sharavogue delivers without the crowds. Park at the N52 junction and stick to the edge paths.