Cycling in Wicklow: Dublin's Mountain Playground

Dublin cyclists are spoiled, and most of them know it. Within an hour of the city centre lies the Wicklow Mountains — a compact, beautiful upland of empty roads, sweeping moorland and serious climbs that has produced generations of Irish racers. It's where the Rás and countless club races have been won and lost, and it's the reason Dublin punches so far above its weight as a cycling city. This is your guide to riding the Garden of Ireland.

Why Wicklow

Wicklow's appeal is proximity plus drama. From the southern edge of Dublin you can be climbing into open mountains in well under an hour, and once you're up there the roads empty out completely. The terrain is genuinely mountainous — long, exposed climbs over high passes, fast moorland descents and tight valley roads — yet it's all within a day ride of a capital city. For visitors it's an underrated alternative to the famous Continental destinations; for locals it's simply the back garden.

The classic climbs and passes

The Sally Gap

The signature crossing of the Wicklow Mountains. A long, exposed climb onto open blanket bog, the Sally Gap connects several iconic roads and offers some of the most atmospheric riding in Ireland — wild, treeless and weather-beaten. Approached from the Dublin side via Glencree or from the Military Road, it's a steady grind rather than a wall, rewarding pacing and respect for the conditions up top.

The Wicklow Gap

The other great east–west pass. A long, steady climb that's a touch more forgiving than the Sally Gap, the Wicklow Gap links the Glendalough valley with the western side of the mountains. It's a favourite for sustained tempo and threshold efforts because the gradient is consistent and the traffic is light.

The Military Road

Not a single climb but a route — a historic road built across the spine of the mountains that strings together the highest, wildest sections, including the approach to the Sally Gap. Riding the Military Road end to end is one of the great Irish cycling experiences, with very little traffic and relentless scenery.

Glenmacnass and Slieve Mann

For those chasing gradient, the punchier climbs around Glenmacnass and the road over Slieve Mann (the high point of the old Rás stages) deliver steeper, leg-sapping efforts to complement the long passes.

Classic loops from Dublin

• The Sally Gap loop: Out through Enniskerry and Glencree, over the Sally Gap, and back via Roundwood or the Lough Tay viewpoint. A quintessential Dublin hard ride of roughly 80–100 km.
• The two-gaps epic: Link the Wicklow Gap and the Sally Gap in one big day for a true mountain test of 120 km+ with serious climbing.
• The Glendalough run: South to the monastic valley of Glendalough, climbing the Wicklow Gap, with a café stop in Laragh. Endlessly scenic and a club-run staple.
• The coastal-to-mountain mix: Roll out along the coast through Bray and Greystones, then turn inland and climb — a gentler introduction to the range.

Gravel in Wicklow

Wicklow has a growing gravel scene built on its forestry network. Coillte fire roads thread through the conifer plantations across the county, offering long, climbable gravel away from any traffic at all. The surface is typically firm forest road rather than technical singletrack, and the riding can be linked into big adventurous loops. A 40 mm+ tyre and a willingness to get muddy in the wetter months will open up a whole second county.

Weather and when to go

Let's be honest: this is Ireland, and the mountains make their own weather. The Sally Gap can be in cloud and wind when Dublin is sunny, and conditions change fast. May to September offers the most settled riding and the longest days, with summer evenings perfect for after-work spins into the hills. Spring and autumn are beautiful but demand layers and a rain jacket. Winter riding is very doable on milder days, but check the forecast for ice on the high passes and carry warm kit — exposure up top is the real risk, not cold in the valleys.

Logistics

Wicklow's huge advantage is access: it's a self-powered ride from Dublin city, and Dublin Airport connects to everywhere. Many riders start from the southern suburbs (Rathfarnham, Dún Laoghaire) to skip the urban roads. Café stops are plentiful in the villages — Roundwood, Laragh, Enniskerry and Glendalough are the classic refuelling points. If you're training to a plan, the long, steady Gaps are ideal for threshold intervals, while the quiet valley roads suit easy Zone 2 endurance days.