Quality Walk

Carrigan Forest: Lough Formal Walk

Lough Formal Walk: Carrigan Forest is part of the Marble Arch Caves Global Geopark. The Lough Formal walk is almost all on forestry tracks and features a short path through the heather to the summit of Formal More. This brisk walk is a chance to fill your lungs with mountain forest air while enjoying the views from Formal More, looking at some features of geological interest and experiencing a touch of wilderness. Sitting quietly for a while, you may be surprised at how much wildlife comes to you, in this seemingly barren woodland.




7 miles

OS Map

Sheet 17

Nearest Town


Route Shape


Route Type

Forest, Lakeland, Woodland


All types of terrain

Grid Reference (Start)


Grid Reference (End)


Point of Interest

The most intriguing feature along the walk is the delightful Lough Formal that lies in the shadow of Formal More and Formal Beg. The bed of Lough Formal sits astride two very different rock types: Dartry Limestone and Glenade Sandstone both of which formed

Area of Outstanding Natural Beauty


Route Description

From the car park, follow the black route as indicated by the way marked posts. This takes you west along a short section of minor road, where the route then branches left onto a forest track. The route takes you through corridors of forest, opening up as you near Lough Formal. Take a moment to watch for woodland wildlife on one of the benches overlooking Lough Formal and proceed along the shores of the lough before making the short climb up Formal More to enjoy the views towards Lough Melvin, Donegal Bay and Cuilcagh Mountain. Retrace your steps to the junction in the path where you then turn right. The next section traces the Roogagh River and takes you deep into the forest before re-emerging onto the hill road.

Please note: This Forest is managed sustainably by NI Forest Service. This walk is situated in a working forest environment and may be subject to diversions and closure from time to time.

Getting to the Start (by Public Transport)

Translink - journeyplanner.translink.co.uk

Getting to the Start (by Car)

From Enniskillen, follow the signs to Derrygonnelly and turn left at the end of the main street. Take the Garrison road via Knockmore and drive into the hills. Approximately 10km from Derrygonnelly, take the lane on the right signed for Big Dog car park.
From Belcoo take the Garrison road, approximately 11km turn right at the Cashel Cross Roads; continue along the country lane, after 8 km take the lane on the left signposted for Big Dog car park.

Accessibility Grade

Grade 4


Information panel. Car parking available in car park for Big Dog Forest, nearest amenities Derrygonnelly.


Marble Arch Caves Global Geopark: Forest Walks Booklet.

Publication Availability


Walk Location
Map of Northern Ireland
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