Routes Planner Features Updates

Login or Signup

Login or Signup

Login or Signup

Running trails & routes

Llyn Cefni Reservoir and Dam – Afon Cefni River loop from Llangefni

Running trails & routes

Llyn Cefni Reservoir and Dam – Afon Cefni River loop from Llangefni

Moderate

4.3

(3)

64

runners

Llyn Cefni Reservoir and Dam – Afon Cefni River loop from Llangefni

01:16

11.7km

90m

Running

Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: August 27, 2026

Waypoints

A

Start point

Bus stop

1

2.93 km

Llyn Cefni Reservoir and Dam

Highlight • Structure

Llyn Cefni is a reservoir in central Anglesey. It's managed by Welsh Water. It was completed in 1951 and supplies water to most of Anglesey.

Tip by

2

4.10 km

Llyn Cefni

Highlight • Lake

3

4.56 km

Afon Cefni River

Highlight • Other

4

4.57 km

River Entering Llyn Llangefni

Highlight • Lake

5

7.31 km

Cefni Forest

Highlight • Forest

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 …

Tip by

6

8.90 km

Llyn Cefni Dam

Highlight • Monument

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 …

Tip by

7

9.67 km

Red Squirrel Viewing Spot

Highlight • Natural Monument

B

11.7 km

End point

Bus stop

Way Types & Surfaces

Way Types

4.87 km

4.52 km

1.74 km

403 m

188 m

Surfaces

4.02 km

2.50 km

1.66 km

1.54 km

1.37 km

292 m

Sign up to see more specific route details

Sign up for free

Elevation

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

Sign up to see more specific route details

Sign up for free

Weather

Powered by Foreca

Sunday 4 October

18°C

13°C

17 %

Additional weather tips

Max wind speed: 19.0 km/h

to get more detailed weather forecasts along your route

Comments

Want to know more?

Sign up for a free komoot account to join the conversation.

Sign up for free

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

Navigate Send to Phone

Move start point

Embed on a website

Report an Issue

Report restricted access

Nearby routes

5.0

459

Pyg and Miners Track loop on Yr Wyddfa (Snowdon) from Pen-y-Pass — Trail Running in Eryri (Snowdonia)

02:11h

12.2km

680m

4.8

473

Snowdon Summit loop, Telegraph Valley & the Llanberis Path — Snowdonia National Park

02:55h

18.9km

1,100m

4.6

507

Llyn Padarn Loop Trail

01:01h

8.54km

120m

4.0

260

Moel Eilio loop from Llanberis

01:47h

13.5km

650m

4.8

179

Carnedd Dafydd & Carnedd Llewelyn loop from the Ogwen Valley

02:50h

19.7km

930m

5.0

125

Yr Wyddfa (Snowdon) Horseshoe loop from Pen-y-Pass — Trail Running in Eryri (Snowdonia)

02:50h

12.2km

830m

5.0

123

Rhyd-Ddu and Snowdon Ranger Path loop on Yr Wyddfa (Snowdon) — Trail Running in Eryri (Snowdonia)

02:29h

15.4km

900m

5.0

115

Carnedd Llewelyn & Carnedd Dafydd loop from the Ogwen Valley — Eryri (Snowdonia) National Park

02:16h

14.8km

910m

5.0

99

Moel Eilio and Yr Wyddfa (Snowdon) loop from Llanberis — Trail Running in Eryri (Snowdonia)

03:27h

22.1km

1,360m

5.0

49

Y Garn to Glyder Fach trail running loop — Parc Cenedlaethol Eryri | Snowdonia National Park

02:19h

11.5km

930m

39

Newborough Forest & Llanddwyn Island loop from Llyn Rhos Ddu — Anglesey

01:54h

16.0km

90m

47

Moel Eilio from Llanberis trail running loop — Parc Cenedlaethol Eryri | Snowdonia National Park

01:44h

12.8km

650m