Overview
The Finn (Irish: An Fhinn) rises at Lough Finn near Fintown, in the shadow of the Bluestack Mountains, and runs roughly 63 km east through County Donegal to join the River Mourne at Lifford and Strabane, where the two form the River Foyle. It’s spate-driven and clear, and it holds one of the finest salmon and grilse fisheries in the county – the Finn and its tributary the Reelan together offer over 25 miles of salmon water. For anglers, that’s the draw. For everyone else, the lower valley gives gentle stretches for canoeing and a good riverside walk between the twin towns of Ballybofey and Stranorlar.
History
The Finn shaped where people settled in this corner of Ulster. The early O’Donnells built at the river’s fords, at Killygordon and Castlefin, and stone foundations survive along the banks. The river was also a working highway: flat-bottomed boats carried textiles and coal up from Derry as far as Castlefin, which is as far as the tide reaches, and the mooring rings are still set into the walls there.
Its best-known crossing is Castlefin Bridge, a twelve-arch structure – six arches over the water, six over land, though soil has now buried some of the land arches. When the river is swollen after heavy rain, high tides back up past the bridge and flood the roads and low ground around the town.
Fishing
The Finn is an established fly-fishing destination. Spring salmon run from March into May, grilse peak in June and July, and sea trout show from July into August. The upper 38 km are managed by the Glenmore Rivers Estate, worked from Glenmore Rivers Lodge near Ballybofey, which offers rod hire, tuition, a fly room and advice on local patterns like the Finn Shrimp and Curry’s Red. The season runs 1 March to 15 September, and you’ll need a Loughs Agency rod licence plus a landowner or club permit.
The honest caveat: most of the good water sits on private estate land and access is strictly controlled to protect the fishery, so this isn’t a river you can just turn up and fish. Sort your permit and beat well before you travel.
The Twin Towns Heritage Trail
For a walk that needs no permit, the 4.8 km Twin Towns Heritage Trail links Ballybofey and Stranorlar along the riverbank, passing the ruins of Drumboe Castle and winding through Drumboe Woods before finishing near the old Stranorlar railway station. Interpretive panels cover the 1798 rebellion, the Civil War and the area’s flax industry. It’s paved and gravelled – fine for pushchairs, wheelchairs and dogs.
The river is a designated Special Area of Conservation (site 002301), so the whole corridor is protected for its salmon and wildlife.
Canoeing
Between Castlefin and Lifford the current eases and the river slows through farmland and mature riverside trees – one of Donegal’s more approachable paddling stretches, suitable for beginners as well as experienced kayakers. Local operators near Castlefin run hire and guided trips with safety briefings and gear.
Getting there and practical information
- Road: the N15 runs parallel to the Finn, giving straightforward access to trailheads, angling points and the towns.
- Parking: free car parks at Glenmore Rivers Lodge, near the heritage trail in Ballybofey, and at the lay-by by Castlefin bridge.
- Public transport: Bus Éireann links Ballybofey and Stranorlar with Dublin, Derry and Letterkenny; the nearest airport is Donegal Airport (CFN).
- Angling season: 1 March – 15 September; peak windows early May to early June (spring salmon) and mid-June to mid-July (grilse).
- Permits: Loughs Agency rod licence plus landowner/club permit. Contacts: Glenmore Rivers +353 86 813 3869; Cloghan Lodge +353 74 91 33003.
- Accommodation: Glenmore Rivers Lodge has on-site rooms, with B&Bs and hotels in Ballybofey, Stranorlar and Lifford.
Check river levels before you set out: the Finn is spate-driven and sections turn swift and dangerous after heavy rain. Book permits and beds ahead of the May salmon run, when the estate water fills up fastest.