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The Marteg - (see Diary) rises inbetwen Banc Du 480 meters 1,574 Ft and Crugyn Llwyd 571 Meters 1,873 Ft.


This is farming and wind trubine country and is fairly exposed on top. It is however beautiful on a fine day with a view of the Marteg valley said to be the widest valley in wales. It is magnificent and worth the walk up to where the Marteg rises amid Marsh and plantation.


As a local farmer Rhydion said it is clean with no chemicals being used in the area. The plantation is acidic and does affect the PH levels of water but farming methods are similar to what they were many many years ago. Locals are very friendly and are willing to talk and even supply water if you are walking long distance.


The area is home to the Trans/Cambrian Way a mountain bike trail, which takes you through the heart of Wales. It also plays host to epic trails namely the Glyndwrs Way and the Wye Valley Walk at the point at which the Marteg enters the Wye at Pont Marteg near Gilfach. At Bwlch Y Sarnau you can enjoy a tea, coffee or cakes at the Owain Glyndwr's way Cafe, which is opan also to trans/cambrian bikers.

The River of Marsh

Flowing into the Wye & Cambrians

i'm inspired by the Wye

River Marteg

Video: Solo Hike Marteg to Wye

We start the Marteg hike at Llangurig and make our way through the backcountry to the source of the river at Brondre Fawr and Banc Du.


It's a small river but siuated amid a big country feel.


We enjoy a magnificent sunrise, epic vally views, great people and the most beautiful end to a walk ever in the Gilfach Valley where the Salmon Spawn.

The Upper Marteg flows through Brondre Fawr, Brondre Fach and Baily Bog. If walking with an

animal be respectful and keep them on a lead. Also keep to the rights of way.

Mountain or Region - Mid Wales/Cambrian Mountains


Authority/District - Powys


Length of River - 20.1 KM, 12.5 Miles


Ascent to Source - Via Brondre Fawr 508 Meters 1,666 ft


The walk up to source will take you along good rights of way. It's good underfoot and suitable for moderate walkers as it's a gentle slope from the road (see link). There you can enjoy magnificent views of the Marteg valley, Mid wales to the West and Fowler's armchair and stone circle.



Maps                        Sheet Finder



Ordnance Survey 1.25,000 Sheet Map 214 

Anquet                  1.25,000 Digital Map 214

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How to get there by bus


From Hereford catch the Sargeants bus into Llandrindod Wells. From Llandrindod Wells catch the T4 bus to Llanbadarn Fynydd. To get close to the Marteg source and to enjoy great views and a spectacular valley walk alongside it walk from Llanbadarn Fynydd overland West towards Davids Well. It's an easy 5KM walk. From Cardiff or the South catch the T4 into Llandrindod Wells and the same as above. From the North/Shrewsbury catch the X75 to Newton then the T4 to LLanbadarn Fynydd. On foot from there same as above.


Valley adventures: You can walk the Marteg Valley and even cut into the valley of Abbeycwmhir, which is spectacular. A circular hike from Llanbadarn Fynydd you can pick your bus back up at either Llanbister or Crossgates.


How to get there by car


From the Midlands/Hereford take the A480 into Kington, then onto the A44 into Crossgates. Once there turn right out of the village onto the A483 to Newton for a short 2KM. Turn left into the beautiful Abbeycwmhir valley where it's said the last Prince of Wales Llewelyn is buried at Abbeycwmhir itself. Head for Bwlch Y Sarnau. Once there go straight through the village crossroads North-East where you'll meet a T Junction. Turn left here and head for Brondre Fawr Hill. The walk starts here. It's your choice what you do from there. You can of course park up at the village and choose an alternative route up onto Brondre Fawr but it is steeper going in parts. From Cardiff or the South take the A470 to Brecon. From Brecon take the B4520 into Builth Wells. From Builth take the A470 into Rhayader. You need to get to Bwlch Y Sarnau, which you do by turning right at Pont Marteg through the beautiful Gilfach valley (worth exploring).  From there same as above. From the North Wrexham take the A483 to Newtown, From Newtown still on the A483 pass through Dolfor for 6KM and turn right passed Pen Ithon Hall. Brondre Fawr Hill and the source of the Marteg walk is 6 KM from the hall. From Shrewsbury take the A458 onto the A483 Newtown. From there it's the same as above.


There are fantastic Valley walks and drives from Gilfach through to Abbeycwmhir. The Marteg source walk is a catalyst and superb in its own right.

The Marteg eventually flows into the Gilfach valley then into the Wye at Pont Marteg. Gilfach is well worth a visit. With a medieval farm and visitor centre you can enjoy this magnificent nature reserve featuring a majestic valley and Salmon run in Autumn in its rocky fast moving waters. See photos above.