Scarr, Laragh & Lough Ouler loop from Glenmacnas Waterfall

This loop is considered a difficult hike, requiring very good fitness, sure-footedness, and sturdy, waterproof shoes. It involves significant elevation gain (around 900 meters) and can take approximately 7 to 9 hours to complete. Portions of the trail are unmarked, demanding navigational skills, and hikers should be prepared for strenuous sections and potentially adverse weather conditions.

The terrain is highly varied and often demanding. You will encounter river crossings, particularly the Glenmacnass River which can be challenging after heavy rain. Large sections, especially the inclines towards Lough Ouler, are notoriously soft, wet, and boggy. Expect steep ascents, mountain paths, and long summit ridges, with some sections being less defined and feeling more like mountain climbing endeavors.

The hike typically starts from the Glenmacnass Waterfall car park. It's advisable to arrive early, especially on weekends or during peak season, as parking can be limited.

Public transport options directly to Glenmacnass Waterfall are limited. It is generally recommended to travel by car to access the trailhead for this loop.

The loop offers breathtaking panoramic views. Key highlights include the impressive Glenmacnass Waterfall at the start, the distinctive heart-shaped Lough Ouler, and extensive 360-degree views from the summits of Scarr Mountain and Tonelagee Summit. You'll also get views of Lough Dan and the surrounding Wicklow Mountains.

Yes, Lough Ouler is famous for its distinctive heart shape when viewed from above. The best viewpoints for this are typically from the slopes of Tonelagee Mountain, offering a spectacular perspective of this glacial lake. You'll find specific viewpoints marked as View of Lough Ouler and View of Lough Ouler from Tonelagee.

No, this trail is not suitable for beginners or families with young children. It is rated as difficult, requires very good fitness, and involves challenging terrain, including unmarked sections and significant elevation gain. There are more family-friendly and beginner-suitable trails elsewhere in the Wicklow Mountains National Park.

Dogs are generally allowed in the Wicklow Mountains National Park, but they must be kept under strict control, preferably on a leash, to protect wildlife and livestock. Be aware that some sections of this challenging route might be difficult for dogs, especially the river crossings and boggy terrain.

The best time to hike is typically from late spring to early autumn (May to September) when the weather is generally milder and daylight hours are longer. However, be prepared for changeable mountain weather at any time of year. Winter hikes are possible but require significant experience, appropriate gear, and awareness of shorter daylight, colder temperatures, and potentially hazardous conditions like ice and snow.

No, there are no specific permits or entrance fees required to hike this loop within the Wicklow Mountains National Park. However, always respect the natural environment, follow Leave No Trace principles, and adhere to any local signage or regulations.

Given the difficult nature and varied terrain, you should bring sturdy, waterproof hiking boots, appropriate layers of clothing (including waterproof outer layers), a map and compass (or GPS device) with navigational skills, plenty of water and snacks, a first-aid kit, and a fully charged phone. Trekking poles can also be very helpful on the steep and boggy sections.

Yes, the route also passes through sections of the European long distance path E8 - part Ireland and the Wicklow Way. You'll also find it intersects with paths like Brockagh to Tonelagee and Laragh to Brockagh.