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Running trails & routes
United Kingdom
Wales
North Wales
Gwynedd
Corris

The Corris Round

Hard

The Corris Round

08:13

58.1km

2,750m

Running

The Corris Round is a difficult 36.1-mile (58.1 km) jogging route in Snowdonia National Park with 9031 feet (2753 metres) of elevation gain.

Last updated: February 26, 2026

Tips

Includes off-grid segments

Navigation instructions may be limited.

After 694 m for 254 m

After 1.92 km for 245 m

After 2.93 km for 550 m

After 11.7 km for 805 m

After 17.8 km for 223 m

After 24.2 km for 759 m

After 29.8 km for 251 m

After 30.5 km for 371 m

After 36.7 km for 251 m

After 37.3 km for 1.78 km

After 46.4 km for 421 m

After 48.5 km for 3.19 km

After 54.1 km for 215 m

Waypoints

A

Start point

Parking

Get Directions

1

11.6 km

Tarren Hendre Summit

Highlight • Viewpoint

Tarren Hendre's grassy summit is the southernmost 2,000-foot (610 m) peak in Snowdonia. This position gives it unique views into mid Wales towards Plylimon and north towards the great mass …

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2

32.5 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 …

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3

57.6 km

Corris

Highlight • Historical Site

A former slate village with a certain type of raw beauty, Corris is a little tourist honeypot. It is set within the Dyfi Forest and boasts a few attractions such …

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B

58.1 km

End point

Parking

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Way Types & Surfaces

Way Types

19.3 km

13.4 km

9.49 km

6.67 km

5.02 km

2.96 km

966 m

327 m

Surfaces

17.2 km

13.8 km

12.9 km

5.02 km

5.02 km

2.92 km

1.26 km

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (860 m)

Lowest point (30 m)

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Weather

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Wednesday 1 July

18°C

10°C

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Frequently Asked Questions

Where does The Corris Round start, and is there parking available?

The Corris Round traditionally starts and finishes at the Corris Institute in the village of Corris. Parking is generally available within the village, though it's always a good idea to arrive early, especially on busy days, to secure a spot.

How challenging is this route, and who is it suitable for?

This is considered a 'Hard run' and is best suited for experienced joggers and trail runners with a very good fitness level. The route's significant distance (around 58 km) and considerable elevation gain (over 2,700m) demand sure-footedness and sturdy shoes. Some sections may even require alpine experience due to the technical terrain.

What kind of terrain can I expect on the trail?

The terrain is highly varied and demanding. You'll encounter a mix of hiking paths, tracks, and some paved sections. Expect extensive unpaved and natural surfaces, including gravel, steep grassy slopes, and rocky chutes. There are also challenging forest sections with potential route-finding difficulties and marshy trods, as well as pathless sections over tussocks.

What are the main viewpoints or points of interest along the route?

The route offers magnificent views and passes several notable points. You'll experience panoramic mountain vistas, including the towering mass of Cadair Idris, and reach the Penygadair summit, Cadair Idris. Another highlight is the Tarren Hendre Summit. The trail also starts in the historic slate village of Corris and passes remnants of the area's industrial heritage.

Is The Corris Round dog-friendly?

While dogs are generally welcome on public footpaths in Snowdonia National Park, this particular route is very long and challenging. If you bring a dog, it must be kept under close control, especially around livestock, and on a lead in certain areas. Consider your dog's fitness and ability to handle the varied and technical terrain over such a long distance.

What is the best time of year to jog this route?

The best time to tackle The Corris Round is typically during the drier months, from late spring to early autumn (May to October). During these periods, the weather is generally more stable, and the ground conditions are less marshy. Winter conditions can make the route significantly more challenging and potentially hazardous due to ice, snow, and shorter daylight hours.

Are there any permits or entrance fees required for The Corris Round?

No, there are no specific permits or entrance fees required to jog The Corris Round itself. As it's located within Snowdonia National Park, general park regulations apply, but access to trails is free. However, if you use private parking facilities, there may be a charge.

Does the route follow any official named trails?

Yes, sections of The Corris Round overlap with several official named trails. You'll find yourself on parts of the Cambrian Way, the Mynydd Moel-Tyrrau Mawr ridge walk, EuroVelo 2 - Capitals Route, Lôn Las Cymru, and the Pony Path, among others.

Is route finding difficult on this trail?

Route finding can be challenging in certain sections, particularly within the forests where the actual path may deviate from GPS tracks. It's essential to pay close attention to navigation and be prepared for pathless sections over tussocks. Carrying a reliable map, compass, and a fully charged GPS device with the route loaded is highly recommended.

What should I pack or prepare for this challenging run?

Given the route's difficulty and length, you should pack sturdy trail running shoes with good grip, appropriate weather-resistant clothing (layers are key), sufficient water and high-energy food, a first-aid kit, and navigation tools (map, compass, GPS). A headlamp is advisable even for daytime runs, especially if you anticipate finishing near dusk. Due to the varied terrain and potential for exposure, waterproofs are essential.

Are there facilities like cafes or accommodation near the start of the trail?

Yes, the village of Corris, where the route starts and finishes, offers some facilities. You can find local cafes and pubs for refreshments before or after your run. There are also accommodation options available in Corris and the surrounding Dyfi Valley area, ranging from B&Bs to guesthouses.

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