Sally Gap Military Road
Military history meets mountain wilderness
Built in 1798 as part of the British military road network to control rebellions, the Sally Gap Military Road slices through some of Ireland’s most remote upland terrain. The gravel track winds between Glencree and Roundwood, crossing exposed bog and heather moorland at 500 meters elevation, with the iconic Sugar Loaf mountain dominating views to the east. The route passes the haunting Lough Tay, known locally as the Guinness Lake for its dark waters and white quartzite beach.
This is an easy to moderate gravel road suitable for any high-clearance vehicle, though weather can turn brutal with zero shelter from Atlantic storms. Best tackled April through October when visibility isn’t shrouded in mountain mist. No permits required, but fuel up in Roundwood or Enniskerry as there’s nothing for miles. The reward is genuine solitude in Ireland’s largest upland area, with wild camping possible in designated spots and endless hiking access into the Wicklow Mountains National Park.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Scenic Drive |
| Surface | Gravel |
| Features | High Altitude, Historic, Remote, Scenic |
| Length (miles) | 12 mi / 19.3 km |
| Duration | 3-4 hours |
| Max elevation (ft) | 1640 ft |
| Best season | April-October |
| Minimum vehicle | High-clearance 2WD |
| Nearest town | Roundwood, Wicklow |
| Land manager | Wicklow Mountains National Park |
| Permit required | No |
| Cell service | None |
| Water crossings | No |
| Dispersed camping | Yes |
| Official sources | wicklowmountainsnationalpark.ie |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Do I need 4WD for Sally Gap, or can a high-clearance 2WD handle it?
A high-clearance 2WD is the minimum and will get you through in dry conditions. The gravel surface is generally manageable, but after heavy rain the road softens and ruts can catch low-slung vehicles — 4WD gives you meaningful insurance on the wet sections.
When does Sally Gap become impassable or dangerous?
Winter months (November–March) bring snow, ice, and thick bog fog that can shut the road down fast — the exposed plateau at 1,640 ft offers zero shelter. April through October is the reliable window; even then, check weather before you go because Atlantic storms roll in without much warning.
Are there permits or fees to drive Sally Gap Military Road?
No permits or fees required to drive the road itself. It falls within Wicklow Mountains National Park jurisdiction, so standard park rules apply — no open fires, no off-road driving beyond the designated route.
What's the hardest section and what should I actually expect?
The road narrows near the high boggy plateau and drainage can be poor after rain, leaving standing water and soft shoulders. There are no technical rock obstacles — the challenge is mostly poor visibility, unpredictable surface conditions, and limited room to pass oncoming traffic on the narrower stretches.
Is dispersed camping allowed along the route, and how far is the nearest fuel?
Dispersed camping is permitted within the national park boundaries — keep it low-impact and well off the road. The nearest fuel and resupply is in Roundwood, roughly 6 miles from the trail start, so top off before you head up onto the mountain.
Trail track
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