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Running trails & routes
United Kingdom
Wales
North Wales
Gwynedd
Llanfihangel-Y-Pennant

Minffordd Path Cadair Idris Loop

Hard

175

runners

Minffordd Path Cadair Idris Loop

02:01

9.36km

790m

Running

The Minffordd Path Cadair Idris Loop offers a difficult jogging challenge, covering 5.8 miles (9.4 km) with a significant elevation gain of 2601 feet (793 metres). You can expect to complete this demanding route in about 2 hours and 1 minute. As you ascend, you'll pass through ancient woodlands and alongside the impressive waterfalls of Nant Cadair Gorge. The trail then circles the stunning glacial lake of Llyn Cau, nestled dramatically within a bowl-shaped depression. From higher up, panoramic views stretch across Eryri National Park, making the effort worthwhile.

Be prepared for a very steep initial ascent on the Minffordd Path, which features rugged and uneven ground. This includes sections of loose scree and numerous steep steps, so sure-footedness is essential. While some parts might be runnable, many sections will require walking due to the gradient and technical terrain. A good level of fitness is crucial for tackling this difficult loop. Consider starting early to allow ample time and to enjoy the views before crowds gather.

Cadair Idris is a mountain steeped in Welsh mythology, often associated with a giant or a sleeping dragon. The name itself translates to "Idris's Chair," referring to a mythical giant. The dramatic landscape, shaped by glacial activity, contributes to the unique character of the trail, particularly around Llyn Cau. This route provides a memorable experience of one of Eryri National Park's most iconic peaks.

Last updated: April 23, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

A

Start point

Parking

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1

2.54 km

Minffordd Path to Cadair Idris via Llyn Cau

Highlight • Trail

The Minffordd Path (Welsh: Llwybr Minffordd) starts on the south side of the mountain, near the glacial lake Tal-y-llyn. Hikers following this route climb past Llyn Cau and along the edge of Craig Cau (a rock face) to Penygadair. The route is 4.4 kilometres long and includes two ascents of over 300 metres.
(Wikipedia)

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2

4.66 km

Complex and striking, Cadair Idris is the Yr Wyddfa (Snowdon) of southern Eryri (Snowdonia): a honeypot mountain renowned for its imperious cliffs, enticing ridges and pretty tarns. It is a peak shrouded in myth. Its name, meaning ‘Chair of Idris’, derives from the Welsh legend of a giant who created a mountainous seat for stargazing.

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3

7.50 km

Stile on the Mynydd Moel Path

Highlight • Structure

Here you can, after the crossing (ladder), go to Mynydd Moel (up) or to the Dol Idris parking (down).

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9.36 km

End point

Parking

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Way Types & Surfaces

Way Types

6.81 km

2.18 km

253 m

101 m

Surfaces

6.75 km

1.92 km

566 m

101 m

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Elevation

Elevation

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Highest point (860 m)

Lowest point (100 m)

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Weather

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Saturday 16 May

11°C

6°C

70 %

Additional weather tips

Max wind speed: 21.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

Is the Minffordd Path Cadair Idris Loop suitable for jogging, especially for beginners?

This route is classified as 'difficult' and is exceptionally challenging for jogging, even for experienced trail runners. The terrain involves very steep ascents, rocky sections, loose scree, and steps, making continuous jogging difficult or impossible for most. Beginners should consider this a strenuous hike rather than a run.

What is the terrain like on the Minffordd Path Cadair Idris Loop?

The terrain is rugged and varied. You'll start with a very steep ascent through woodland with zigzags and impressive waterfalls. As you gain elevation, the path becomes rocky, with sections of loose scree, particularly towards the summit. Steep steps are common, and some areas may even require scrambling. The descent can also be steep and feature loose rocks.

How long does it typically take to complete this route?

For jogging, the estimated duration is around 2 hours. However, due to the challenging and steep terrain, many will find themselves walking significant portions, especially on the ascents and descents. For hiking, it typically takes 4-6 hours depending on fitness and breaks.

Where can I park for the Minffordd Path Cadair Idris Loop?

Parking is available at the Minffordd Path trailhead. It's advisable to arrive early, especially during peak season, as parking can fill up quickly for this popular route.

Are there public transport options to reach the trailhead?

Public transport options to the Minffordd Path trailhead are limited. It's best to check local bus schedules for services to the nearest villages, but direct access to the trailhead often requires a car or a taxi from a larger town.

What notable landmarks or viewpoints will I encounter on this route?

The route offers breathtaking scenery. You'll pass impressive waterfalls in Nant Cadair Gorge, traverse ancient woodlands, and circle the stunning glacial lake of Llyn Cau. The summit, Penygadair, provides panoramic views across Eryri National Park and the coast.

Is the Minffordd Path Cadair Idris Loop dog-friendly?

Yes, dogs are generally allowed on the Minffordd Path. However, it's crucial to keep them on a lead, especially in areas with livestock and ground-nesting birds. The rocky and steep terrain can also be challenging for some dogs, so assess your dog's fitness before attempting the route.

Do I need a permit or is there an entrance fee for this trail or Eryri National Park?

No, you do not need a permit to hike or jog the Minffordd Path Cadair Idris Loop, and there is no entrance fee for Eryri National Park itself. However, parking at the trailhead may incur a fee.

What is the best time of year to visit the Minffordd Path Cadair Idris Loop?

Late spring to early autumn (May to October) generally offers the best conditions, with longer daylight hours and milder weather. However, be prepared for changeable mountain weather at any time of year. Winter conditions can be severe, with snow and ice making the route significantly more hazardous and requiring specialist equipment.

Does the Minffordd Path Cadair Idris Loop intersect with other trails?

Yes, the route primarily follows the Minffordd Path. It also includes sections of the Cambrian Way and the Mynydd Moel-Tyrrau Mawr ridge walk, offering connections to other parts of the Cadair Idris massif.

What should I wear or bring for this challenging route?

Given the difficult terrain and changeable mountain weather, wear sturdy hiking boots with good ankle support, and layer your clothing. Bring waterproof and windproof outer layers, plenty of water, snacks, a map and compass (or GPS device), and a first-aid kit. Even in summer, conditions can change rapidly.

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