Routes

Planner

Features

Updates

App

Login or Signup

Get the App

Login or Signup

Login or Signup

Routes
MTB trails
United Kingdom
Wales
North Wales
Anglesey

Trewalchmai

The best MTB trails around Trewalchmai

5.0

(6)

69

riders

10

rides

Mountain biking around Trewalchmai features a landscape characterized by significant forest areas, such as Newborough Forest and Cefni Forest, alongside large reservoirs like Llyn Cefni. The terrain includes a mix of gravel roads and paths, with some routes extending towards coastal areas and nature reserves. Elevation changes are generally moderate, making many routes accessible for various skill levels.

Best mountain bike trails around Trewalchmai

  • The most popular mountain bike trail is Newborough Forest Trail – Llyn Cefni Dam loop from…

Last updated: April 25, 2026

5.0

(2)

24

riders

#1.

Newborough Forest Trail – Llyn Cefni Dam loop from Bodorgan

49.0km

02:54

210m

210m

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Navigate with device

Send to Phone

Save

Moderate

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate
guide_signup
Let us show you the way with the komoot mobile app
With a free komoot account, you can easily find, customize, and navigate endless outdoor adventures.

Sign up for free

Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

Easy

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate

Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

Easy
Sign up for free to see 6 more rides around Trewalchmai.

Get access to more routes and recommendations from other explorers.

Sign up for free

Already have an account?

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

Start today with a free account

Your next adventure awaits.

Login or Signup

Popular around Trewalchmai

Hiking around Trewalchmai

Cycling around Trewalchmai

Road Cycling Routes around Trewalchmai

Running Trails around Trewalchmai

Tips from the Community

AWM
February 21, 2026, Llyn Cefni Reservoir and Dam

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.

0

0

Quiet paths easy cycling crosses deserted railway line still present, which there trying to reopen

0

0

Targi
September 1, 2025, Cefni 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 sanctuary for red squirrels and diverse birdlife, making it a perfect spot for quiet nature exploration and wildlife watching.

1

0

Very flat, easy surface, great little loop

0

0

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

3

0

Malltraeth Cob Malltraeth is the next village along from Newborough to the north. The two villages are linked by a “cob” – a dike wall – with a footpath/cycle track along its top. The cob was completed in the early 19th Century, under the direction of Thomas Telford and John Rennie. At the same time, the Afon Cefni was straightened (and straitened) creating what looks like a canal, but is still tidal. This created nearly 1,600ha of grazing land on either side of the Cefni. Much of this land is now a nature reserve managed by the RSPB. Also you will see Llyn Parc Mawr Community Woodland where they have picnic areas where you can enjoyed the red squirrels. It is off road but I used my gatorskins and it was fine.

3

0

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.

4

0

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.

0

0

Frequently Asked Questions

What are the difficulty levels of mountain bike trails around Trewalchmai?

The mountain bike trails around Trewalchmai cater to a range of abilities. There are 7 easy routes, suitable for beginners or those looking for a relaxed ride, and 3 moderate routes for more experienced riders seeking a greater challenge. There are no difficult routes listed in this guide.

What is the typical length and duration of mountain bike trails in the Trewalchmai area?

Trail lengths vary significantly. For instance, the Cefni Forest – Llyn Cefni Reservoir and Dam loop from Isle of Anglesey is about 7.3 miles (11.7 km) and takes around 50 minutes. Longer routes, like the Newborough Forest Trail – Llyn Cefni Dam loop from Bodorgan, extend to 30.4 miles (49.0 km) and can take nearly 3 hours to complete.

Are there any family-friendly mountain bike trails near Trewalchmai?

Yes, many of the trails around Trewalchmai are suitable for families, especially those looking for easier rides. Routes through areas like Cefni Forest and Newborough Forest often feature well-maintained gravel paths with moderate elevation changes, making them accessible for various skill levels. The Cefni Forest – Llyn Cefni Reservoir and Dam loop from Isle of Anglesey is an excellent easy option.

What kind of terrain can I expect on mountain bike trails in Trewalchmai?

The terrain around Trewalchmai is characterized by significant forest areas, such as Newborough Forest and Cefni Forest, alongside large reservoirs like Llyn Cefni. You'll find a mix of gravel roads and paths, with some routes extending towards coastal areas and nature reserves. Elevation changes are generally moderate, offering a varied but mostly accessible riding experience.

Are there any loop mountain bike trails in Trewalchmai?

Yes, many of the popular mountain bike routes in the Trewalchmai area are loops, offering a convenient way to explore without retracing your steps. Examples include the Newborough Forest Trail – Llyn Cefni Dam loop from Bodorgan and the Llanddwyn Beach – Newborough Forest Trail loop from Anglesey.

What can I see along the mountain bike trails around Trewalchmai?

The trails offer views of diverse landscapes and points of interest. You can cycle alongside the Llyn Cefni Reservoir and Dam, explore the Lon Las Cefni cycle path, or pass by historical sites like the RAF Mona Airfield and the Barclodiad y Gawres Neolithic Burial Chamber.

What do other mountain bikers enjoy the most about mountain biking in Trewalchmai?

The area is highly rated by the komoot community, with an average score of 5.0 stars from more than 5 reviews. Riders often praise the extensive forest trails, scenic reservoir loops, and the variety of routes that cater to both beginners and more experienced riders.

Are there options for advanced mountain bikers in Trewalchmai?

While there are no routes classified as 'difficult' in this guide, experienced riders can find longer, moderate trails that offer a good challenge. The Llynnon Mill – Cemlyn Bay Nature Reserve loop from Llannerch-y-Medd, for example, is a moderate 34.1-mile (54.9 km) route with over 550 meters of elevation gain, providing a more demanding ride.

Can I find places to eat or drink near the mountain bike trails in Trewalchmai?

While specific pubs and cafes directly on the trails are not listed, the routes often pass through or near villages and towns where you can find amenities. Planning your route to include stops in nearby communities is recommended for refreshments.

What are the best conditions for mountain biking in Trewalchmai?

The trails are generally enjoyable in dry conditions, especially those with gravel surfaces. While many forest paths can be ridden year-round, some sections might become muddy after heavy rain. Always check local weather conditions before heading out.

How many mountain bike trails are included in this guide for Trewalchmai?

This guide features 10 mountain bike trails around Trewalchmai, offering a diverse selection of routes for various skill levels and preferences.

Are there any trails that combine coastal scenery with forest riding?

Yes, the Llanddwyn Beach – Newborough Forest Trail loop from Anglesey is a great option that combines the coastal beauty near Llanddwyn Beach with sections through the Newborough Forest, offering a varied and scenic ride.

Most popular routes around Trewalchmai

Hiking around Trewalchmai

Most popular attractions around Trewalchmai

Places to see

Store rating

Get inspired with the komoot mobile app

With a free komoot account, you can easily find, customize, and navigate endless outdoor adventures.

or

Join komoot Now

Store rating

Explore more

Browse the best MTB trails in other regions.

Llanfihangel YsgeifiogRhosyrBeaumarisLlanidanAnglesey Aonb (Ahne Ynys Môn)BodorganMenai BridgeLlangristiolusLlanfair PwllgwyngyllLlanddonaAberffrawLlanddaniel FabNewborough Warren And Ynys Llanddwyn National Nature ReserveCwm CadnantLlangoedLlyn CoronBodfforddCoedwig Niwbwrch / Newborough ForestLlangefniCors Bodeilio National Nature ReserveBryngwranLlanddyfnanPenmynyddMoelfreLlanfair-Yn-NeubwllPentraethCors Goch National Nature ReserveCefni ReservoirLlanfair-Mathafarn-EithafCors ErddreiniogLlaneugradRhosybolLlannerch-Y-MeddTref AlawLlanfaelogLlyn LlywenanBodedernLlanfachraethTrearddurRhoscolynHolyheadValley

Nearby adventure guides

Things to Do around Bodffordd

background

Get ready to conquer new peaks

Sign up for Free

Explore
RoutesRoute plannerFeaturesHikesMTB TrailsRoad cycling routesBikepackingSitemap
Download the app
Follow Us on Socials

© komoot GmbH

Privacy Policy