Slí Grainne Mhaol
Walking Trail · Mayo
Slí Grainne Mhaol is a 6.2 km strenuous waymarked loop in Mayo, starting near Derreens.
Grade
| Activity | Grade | Difficulty | Time |
|---|---|---|---|
| Walking | Strenuous | Challenging | 2.5 hours |
Getting there
Starts at Pattens Public House, near Derreens.
- Trailhead coordinates
- 53.9027, -9.94128
- Irish Grid reference
- L 724 965
- Ordnance Survey sheets
- Discovery Series Sheet 30
The National Trails Register's own latitude and longitude fields are empty for all 1,186 trails on it. This trailhead comes from Sport Ireland's separate Trailheads dataset, matched to this trail on its register ID.
About the trail
Stunning panoramic views of Clew Bay, Achill Sound. Historical features. Deserted villages. Great walking surface.
- Waymarking
- Green arrow on white background with Granuaile castle logo
- Dogs
- No
Who manages it
Coiste Forbartha Chill Dawnait
Michael Patten, Derreens, Achill, Co Mayo
Conditions and closures change. The operator is the authority on both, not this page.
Trails nearby
Measured trailhead to trailhead, in a straight line.
- Great Western Greenway - Achill Sound to Cashel 3.5 km away · 4.3 km trail
- Mulranny - Causeway Loop 10 km away · 4.7 km trail
- Mulranny - Lookout Hill Loop 10 km away · 5.9 km trail
- Inishbiggle - Bull's Mouth Loop 10 km away · 3.8 km trail
- Clare Island - Fawnglass Loop 11 km away · 2.8 km trail
- Clare Island - Knocknaveena Loop 11 km away · 6.9 km trail
Common questions
How long is the Slí Grainne Mhaol?
6.2 km, recorded as a loop on Sport Ireland's National Trails Register. It climbs 334 m in total. Sport Ireland estimates 2.5 hours.
How hard is the Slí Grainne Mhaol?
Sport Ireland grades it Strenuous, with an overall difficulty of Challenging. Grades are set against national criteria, so they are comparable with other registered trails.
Where does the Slí Grainne Mhaol start?
Starts at Pattens Public House, near Derreens. The trailhead is at 53.9027, -9.94128 (Irish Grid L 724 965).
Can you bring a dog on the Slí Grainne Mhaol?
No. The register records dogs as not allowed on this trail.
Who manages the Slí Grainne Mhaol?
Coiste Forbartha Chill Dawnait. They are the authority on current conditions and closures, not this page.
More in Mayo
Trail data from the Sport Ireland National Trails Register, licensed under CC BY 4.0. Trailhead coordinates from the companion Trailheads dataset. Snapshot taken 2026-08-13.