4.5
(83)
772
riders
75
rides
Circular bike routes around Cefni Reservoir offer paths through varied landscapes on Anglesey. The region features the reservoir itself, alongside Cefni Forest and the River Cefni, providing a mix of waterside and wooded sections. Elevation changes are generally gentle, with some routes including moderate climbs, making it suitable for different cycling abilities.
Last updated: July 8, 2026
1
riders
58.9km
03:37
380m
380m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.8
(11)
127
riders
43.6km
02:53
150m
150m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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4.5
(2)
16
riders
26.6km
01:41
260m
260m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
14
riders
6.19km
00:33
30m
30m
Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
9
riders
8.44km
00:42
60m
50m
Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
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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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Pont Marquis Bridge Spanning the Afon Cefni, carrying the Trefdraeth to Llangaffo road, c. 3km ENE of Malltraeth. The bridge, which is Grade II listed, was built in the early C19, was named for the Earl of Uxbridge, first Marquis of Anglesey. It gives wonderful scenery over the marsh land and plenty of wildlife.
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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 only crossing point for the Afon Cefni between the coast and the A5, with great views over the marshes and the straightened channel of the river.
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The routes around Cefni Reservoir cater to a range of abilities. There are 15 easy routes perfect for beginners, 57 moderate routes for those seeking a bit more challenge, and 10 difficult routes for experienced touring cyclists. This variety ensures there's something for everyone, from gentle reservoir paths to routes with moderate climbs.
Yes, Cefni Reservoir offers several family-friendly options. Routes like the Llyn Cefni – Llyn Cefni Reservoir and Dam loop from Llangwyllog are classified as easy, covering about 6 km in under an hour, making them suitable for families with children or those looking for a relaxed ride. These routes typically feature gentle terrain around the reservoir.
Yes, circular routes are a defining characteristic of touring cycling around Cefni Reservoir. Many of the 82 available routes are loops, allowing you to start and finish at the same point. For example, the Llyn Cefni Reservoir and Dam – Cefni Forest loop from Anglesey offers a pleasant circular ride through varied scenery.
Touring cycling around Cefni Reservoir is enjoyable throughout much of the year. Spring and autumn offer pleasant temperatures and beautiful scenery, with changing foliage or blooming wildflowers. Summer is also popular, though routes can be busier. Winter cycling is possible, but be prepared for cooler, potentially wetter conditions, and shorter daylight hours.
Yes, several routes incorporate interesting landmarks and natural features. For instance, the Llynnon Mill & RAF Valley loop from Llyn Cefni — Ynys Môn / Anglesey takes you past historic Llynnon Mill and offers views of RAF Valley. Other routes connect to the River Cefni, Cefni Forest, and even coastal areas like Llanddwyn Beach, providing diverse scenery.
The area is highly rated by the komoot community, with an average score of 4.6 stars from over 80 reviews. Touring cyclists often praise the varied landscapes, which include tranquil reservoir paths, sections through Cefni Forest, and views of the wider Anglesey countryside. The network's suitability for different ability levels is also frequently highlighted.
Absolutely. Cefni Forest is a prominent feature of the area, and several touring cycling routes pass through or around it. The Cefni Forest – Mynydd Bodafon Summit loop from Anglesey is a moderate route that takes you through the forest and towards Mynydd Bodafon Summit, offering a mix of wooded and open landscapes.
The duration varies significantly depending on the route's length and your pace. Shorter, easy routes like the Llyn Cefni – Llyn Cefni Reservoir and Dam loop from Llangwyllog can be completed in about 33 minutes. Longer, moderate routes, such as the Stone bridge over the River Cefni – Llanddwyn Beach loop from Anglesey, might take around 2 hours 53 minutes.
Yes, some routes offer a fantastic blend of inland and coastal landscapes. The Stone bridge over the River Cefni – Llanddwyn Beach loop from Anglesey is a great example, connecting the Cefni Reservoir area with the River Cefni and extending towards the beautiful Llanddwyn Beach, providing diverse views.
The terrain around Cefni Reservoir is varied but generally manageable for touring cyclists. You'll find smooth reservoir paths, sections through Cefni Forest, and quiet country roads across the Anglesey landscape. While elevation changes are mostly gentle, some routes include moderate climbs, offering a good mix for different preferences.
Yes, some routes offer opportunities to reach higher ground for panoramic views. For example, the Cefni Forest – Mynydd Bodafon Summit loop from Anglesey includes a section towards Mynydd Bodafon Summit, which provides elevated perspectives of the surrounding area and beyond.


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