The best running trails around Cefni Reservoir
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1,227
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Jogging around Cefni Reservoir offers a variety of running routes through a landscape characterized by its central reservoir, surrounding woodlands, and river paths. The area provides a mix of flat sections along the water's edge and gentle inclines through forested areas. Runners can explore trails that follow the Afon Cefni river or venture into the Cefni Forest. The terrain is generally accessible, providing suitable conditions for different running preferences.
Best jogging routes around Cefni Reservoir
- The most popular jogging route…
Last updated: May 11, 2026
18
runners
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
6
runners
3.04km
00:21
20m
20m
Easy run. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
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18
runners
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
16
runners
8.52km
00:54
90m
90m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
16
runners
4.94km
00:31
40m
40m
Easy run. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
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Tips from the Community
We visited for the Parkrun, which was cancelled whilst a walkway is fixed (some more weeks, I would expect). You can still access the lake along the disused railway line for part of the way - but not a good surface for running. Then there is a path around the lake with views across the lake and stretches through the woods, lovely, if rather muddy in places following wet weather. In total about 9 km around. Hope to do this again in the Spring with the promise of wild daffodils and perhaps a red squirrel.
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Quiet paths easy cycling crosses deserted railway line still present, which there trying to reopen
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Cefni Forest on Anglesey surrounds Llyn Cefni reservoir near Llangefni. It offers peaceful woodland trails for walking and cycling, linking to the Lon Las Cefni route. The forest is a sanctuary for red squirrels and diverse birdlife, making it a perfect spot for quiet nature exploration and wildlife watching.
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Llyn Cefni Dam During World War II, a water scheme was devised for the town of Llangefni in central Anglesey. It involved water from a local source being pumped to two settling tanks in the Dingle part of the town. From here the water was pumped across the river to a reservoir and water tower, on the site of the present Pennant Estate. These arrangements became redundant with the building of the Cefni Reservoir, which was completed in 1951, but the settling tanks and pumping station survive in Llangefni to this day. The new scheme was designed to supply most of the water needs for the people of Anglesey for the foreseeable future
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Llangefni (meaning "church on the River Cefni", Welsh pronunciation: [ɬaŋˈɡɛvni]) population 5,116, making it the second-largest town in the county and the largest on the island. The community includes the village of Rhosmeirch. Wonderful welsh town with all the shop can get busy in summer holidays.
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The largest town on Anglesey (Holyhead is twice the size but is technically on Holy Island). Now bypassed by the island’s main roads which actually makes it a decent hub if you’re cycling across the south of the island.
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The path is fairly easy to miss if you’re coming along the A5: look for the section of railing by the roadside which marks the entrance. The path itself has some awkward narrow turns where it passes under the A55 but after that it’s wide, smooth and usually clear.
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Frequently Asked Questions
How many running routes are available around Cefni Reservoir?
There are over 60 running routes available around Cefni Reservoir, offering a wide range of options for different preferences and fitness levels.
What is the general difficulty level of the jogging routes at Cefni Reservoir?
The majority of running routes at Cefni Reservoir are rated as moderate, with 53 out of 69 routes falling into this category. There are also 9 easy routes perfect for beginners and 7 more challenging options for experienced runners.
Are there any easy running routes suitable for beginners or a relaxed jog?
Yes, Cefni Reservoir offers several easy running routes. A great option is the Llyn Cefni Dam – Cefni Forest loop from Anglesey, which is an easy 1.9 miles (3.0 km) path exploring the dam area and Cefni Forest. Another easy choice is the Running loop from Llangefni, covering about 3.1 miles (4.9 km).
What are the typical durations for running routes at Cefni Reservoir?
Running durations vary significantly. Shorter, easy routes like the Llyn Cefni Dam – Cefni Forest loop can be completed in about 20 minutes. Moderate routes, such as the popular Llyn Cefni Reservoir and Dam – Afon Cefni River loop, typically take around 50 minutes. Longer, more challenging trails can extend to over 3 hours, like the Afon Cefni River Trail – Newborough Forest Gravel Road loop.
Are there circular running routes around Cefni Reservoir?
Yes, many of the running routes around Cefni Reservoir are circular, allowing you to start and finish at the same point. Examples include the popular Llyn Cefni Reservoir and Dam – Afon Cefni River loop and the shorter Llyn Cefni Dam – Cefni Forest loop.
What kind of scenery or points of interest can I expect along the running trails?
The running trails at Cefni Reservoir offer diverse scenery, including views of the central reservoir, sections along the Afon Cefni river, and paths winding through dense Cefni Forest woodlands. You'll experience a mix of open water views and sheltered forest environments.
What do other runners enjoy most about jogging in Cefni Reservoir?
The area is highly rated by the komoot community, with an average score of 2.7 stars from over 8 reviews. Runners often praise the varied terrain, which includes reservoir paths, river trails, and woodlands, providing options for different ability levels and scenic experiences.
Is Cefni Reservoir a good place for wildlife spotting while running?
Cefni Reservoir is known for its natural environment, making it a good spot for wildlife observation. The reservoir itself is a significant bird habitat, and the surrounding woodlands and river areas provide opportunities to see various local species while you run.
Are there any cafes or pubs near the jogging routes for refreshments?
While the immediate reservoir area is primarily natural, the nearby town of Llangefni, which serves as a starting point for some routes like the Closed for Maintenance – Y Cwt Coffi loop, offers various cafes and pubs where you can find refreshments before or after your run.
What is the best season for running at Cefni Reservoir?
Cefni Reservoir offers enjoyable running conditions throughout the year. Spring and autumn provide pleasant temperatures and beautiful foliage, while summer is ideal for longer daylight hours. Winter runs can be crisp and quiet, though some paths might be muddier after rain.
Where can I park when visiting Cefni Reservoir for a run?
Parking facilities are available at various access points around Cefni Reservoir, particularly near the dam and in areas that serve as trailheads for popular routes. Specific parking information can often be found on individual route pages on komoot or local signage.
Are the running routes at Cefni Reservoir suitable for families?
Yes, Cefni Reservoir has routes suitable for families, especially the easier, shorter loops. These paths often have gentler inclines and well-maintained surfaces, making them accessible for a family outing. The Llyn Cefni Dam – Cefni Forest loop is a good example of a family-friendly option.
Most popular routes around Cefni Reservoir
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