Cahir itself takes a day. The country around it takes considerably longer, and is the reason to stay rather than stop. This page works outwards from the town.
In the town
Cahir Castle on its island in the Suir is one of the largest and most complete medieval castles in Ireland, held by the Butlers from 1375 and given up without a fight to Cromwell in 1650, which is why it is still standing.
The Swiss Cottage is two kilometres downriver, a cottage orne built around 1810 for the same family to a design attributed to John Nash. Guided tour only.
The Coronation Walk joins them along the river bank and is the best walk in the town.
The Butler Trail is the self guided route that ties Cahir to Clonmel, Carrick-on-Suir, Fethard and Roscrea, with a free audio guide app. Cahir's own streets carry more than the castle: the old linen mills and granary, the Mausoleum, St Paul's Church, also attributed to Nash, and the Erasmus Smith school. A guided walking tour is the way to see them with the stories attached.
The woods
Glengarra Wood lies about fifteen kilometres southwest of Cahir off the M8 and the R639, some 570 hectares on the southern slopes of the Galtees. The main track follows the Burncourt River up into the foothills, there are mature yews along the sheltered lower section, and the trees are tagged and named. Two loops, the Red and the Millennium at around seven kilometres, and everything is easy going with modest climbing. It is also a starting point for Galtymore.
Scaragh Wood is closer, half an hour on foot from the Square, with three Coillte loops and the Lissava portal tomb along the way. Walking near Cahir has the detail on both.
The mountains
The Galtees rise behind the town and are the highest inland range in Ireland, with Galtymore the summit most people walk. The Knockmealdowns are south across the valley, lower and gentler, and the Vee road climbs over them through one of the best drives in the country. Take it in autumn if you can.
The Glen of Aherlow is on the far side of the Galtees, half an hour by road, and has its own network of loops and a caravan park if you want to base yourself under the hills rather than in the town.
Mitchelstown Cave
Mitchelstown Cave at Burncourt is about fifteen kilometres from Cahir, off the M8. It is one of the more impressive show caves in Europe, with large limestone chambers and calcite formations, and it was the first cave in Ireland developed for public visits, in 1972. It is a genuine cave rather than a themed attraction, which means it is cool, damp and worth a jacket. Check the season and times with the cave directly.
The Apple Farm
The Apple Farm between Cahir and Clonmel is a working fruit farm that sells its own juice and fruit and runs the camping park on the same ground. Worth a stop for the juice alone.
Over the county lines
The Rock of Cashel is twenty minutes north on the M8 and is the one unmissable thing in Tipperary if you have only seen Cahir. Lismore Castle Gardens are over the Knockmealdowns in Waterford, reached by the Vee. Ormond Castle at Carrick-on-Suir is the finest Elizabethan manor house in Ireland and is the other end of the Butler story that starts in Cahir.
Clonmel is twenty minutes east and is the nearest large town, with the shops, the cinema and the choice that Cahir does not have.
On the water
The Suir Blueway starts at Cahir as a 53km paddling trail to Carrick-on-Suir. The waymarked walking and cycling section is downstream between Clonmel and Carrick. Fishing on the River Suir covers the angling, which is what most people come to this water for.
Planning
Things to do in Cahir is the shorter list if you have one day. Getting to Cahir covers arriving, and the accommodation pages cover staying: hotels, bed and breakfast, self catering and camping.