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Bidean a' Ghlas Thuill (An Teallach)


Quick Facts
This is the height of the mountain above sea level. However, on the climb, it is the ascent that matters, i.e. the sum of all the uphill parts of the route.
1062 m (3484 ft)

This is the standard notation used on Ordnance Survey Landranger maps.

Each reference consists of two letters identifying a 100,000 metre square block then three digits defining the Easting and finally the three digits defining the Northing with reference to the South West corner of the block.

NN166712 is the grid reference for the summit of Ben Nevis. Where you are given the map number ( For Ben Nevis = 41) it is acceptable to omit the two initial letters e.g. 166712. (Instructions on how to read the references are given on the OS maps).

Grid Ref.
An indication of this mountains height rank within its class. Where two mountains share the same height they are ordered alphabetically.
72 of 282 Munros
The number of ascent routes currently available on Munromagic.
Mountain names are usually in Gaelic, the native language of the Scottish Highlands, or have been derived from the old Scots and Norse languages. We give the most commonly accepted meaning, but accept that some of these are disputed.
Pinnacle of the green hollow (The forge)

The UK is covered by 204 Ordnance Survey Landranger 1:50,000 scale maps. Maps numbered 1 to 86 cover Scotland but for the highest mountains (Munros) only 23 maps are required. The name given roughly describes the area covered by the map.

OS Landranger Maps Required
  19   Gairloch & Ullapool, Loch Maree

A description of the characteristics of the mountain including any hazards of which you should be aware.

An Teallach is arguably Scotland's most beautiful and is certainly one of its most challenging mountains.

The peaks of An Teallach are arranged in a semi-circle around Loch Toll an Lochain. Bidean a' Ghlas Thuill forms the N wall of this corrie and has a long E ridge leading to Glas Mheall Liath from where a descend can be made to Coire' a' Ghiubhsachain with its gently sloping rocks and dramatic escarpment. The N face of this E ridge is craggy and should be avoided.

Bidean a' Ghlas Thuill has a short SW ridge that connects to Sgurr Fiona and a steep rocky N ridge that descends to a broad ridge N of Sron a' Choire from where a stalkers path leads to Dundonnell.

Bidean a' Ghlas Thuill is a craggy mountain requiring some minor scrambling.

Hazards you may encounter on Bidean a' Ghlas Thuill include
 Steep slopes on or near ascent routes.
 Stony/rocky Slopes on or near ascent routes.
 Crags near summit.
 Narrow Ridges, with exposure.
 Scrambling (minor), easy hand and footholds.
General Considerations
 Temperature decreases by 1degree C for every 100m of ascent.
 Wind usually increases with altitude.
 Visibility can change markedly with cloud level.
 River/Stream levels can increase markedly in one day.
Picture Gallery for Bidean a' Ghlas Thuill

A selection of weather forecasts local to #GetMountain.Top_Name#.

Ordnance Survey digital maps are also available to members.

 Weather & OS Maps
North West Highlands
by MWIS (PDF format)
West Highlands
by Met Office
by Metcheck
Bidean a' Ghlas Thuill Area Map
Legend  Munro  Corbett  Graham  English/Welsh Top  Accommodation

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The summary information of one or more ascent routes that include Bidean a' Ghlas Thuill.

Click on the route title to load the full content for that route.

 Routes that include Bidean a' Ghlas Thuill
  Ascent Distance Time Including... Description Rating
1 1590 m 15.44 km 6 hrs Bidean a' Ghlas Thuill and Sgurr Fiona  An Teallach is a Scottish classic. The mountain is spectacular and the route is difficult, especially if you traverse all of the pinnacles. If you by-pass them then it is moderate with some exposure.  

Pictures submitted by members on the summit of Bidean a' Ghlas Thuill

 Baggers Gallery for Bidean a' Ghlas Thuill

me at the summit on my 200th

© John Frew

Image by John Frew

The face and the posture says it all. Pure misery on the summit of Bidein a` Ghlas Thuill. We will return in the future. 22/08/2012

© Eileen Stark

Image by Eileen Stark

Horrible weather on the summit of Bidein a` Ghlas Thuill. 22/08/2012. No views whatsoever. Must come back.

© Eileen Stark

Image by Eileen Stark

Gary, Rachel and Stephen at the summit trig of Bidean a'Ghlas Thuill nearing completion of the full clockwise traverse, a long but great day out.

© Keith Briggs

Image by Keith Briggs
View All 12 Baggers Images for Bidean a' Ghlas Thuill
The logging section stores any entries for Bidean a' Ghlas Thuill in your own log. From here you can
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Recently Climbed By
Paul Buchanan on 07 Jun 2019
David Cullen on 11 Aug 2018
Iain Aitchison on 22 Jul 2018
Neil Woodhead on 16 Jul 2018
Nigel Pexton on 01 Jul 2018

If a member has uploaded a tracklog as part of their personal route log and opted to share it then it will be presented here.

You can view a members route overlayed on an online map or download the KMZ file for use in Google Earth.

 Shared Members Track Logs
Bidean a' Ghlas Thuill and Sgurr Fiona
by Markus Wirth
Bidean a' Ghlas Thuill
by David McSporran
Sgurr Fiona and Bidean a' Ghlas Thuill
by Kenny Mcneill
Bidean a' Ghlas Thuill and Sgurr Fiona
by David McSporran

Post a few words about Bidean a' Ghlas Thuill or read what others have had to say.

Showing the most recent 5 of 6 comments. Would you like to view all 6?
Stuart Brady
wrote on
June 6, 2012
Unfortunately, I chose the only cloudy and misty day of the week to do this route. I did the clockwise route starting at the Corrie Hallie car park. Heading up to Sail Liathe. I got to the summit of Sail Liathe fairly quickly (less than 2 hrs...which is good for on old codger like me!) but mist and low cloud really gave me some problems. I took quite a few wrong turns and lost a lot of time. I headed too far west at one point climbing another peak, before the mist cleared and I could see the pinnacles that I'd missed. I followed my tracks back and then got onto the pinnacle route, electing to scramble the tops. Sgurr Fiona was next and then a hard climb up to Ghlas Thuill. This wouldn't normally have been too difficult, but I was tired and my legs were killing me. I hadn't done any Munro's for 4 or 5 years so this was probably too much after such a lay off. Unfortunately, low mist and cloud persisted for most of the day so I only caught fleeting views. Still a fantastic day.
Nick Bulbeck
wrote on
July 30, 2010
Glas Mheall Liath should not be missed if you've time. Nice boulder-hopping, some good scrambling if you want it (though all difficulties can easily be avoided) and superb views both out over the Destitution Road and back around the Toll an Lochain.
Alex Bryce
wrote on
April 14, 2009
Traversed "anti-clockwise. As for the pinnacles/scrambling bits, all difficulties can be avoided, though even the traverse path needs a head for heights. We did the pinnacles and L.B's seat with little problem on a calm day. We dropped off the crest a little before the last pinnacle on a little path that descends to the traverse path, but some of our party descended the last pinnacle direct and were caught out with some exposed down climbing - not recommended. I'd advise either do it clockwise, or drop off the crest just below the steep terminus of the southern-most pinnacle. Cracking views.
Dave Black
wrote on
March 25, 2003
One of the great Scottish routes, but not to be taken lightly. This is particularly true in winter, when depending on conditions the traverse of the pinnacles can be extremely difficult and pose a serious challenge to even experienced mountaineers, and requires specialised skills and equipment.
Eric Fisher
wrote on
June 5, 2002
This is without doubt one of Scotlands most beautiful mountains but sadly most of the paths which avoid the scrambling routes are in a poor state. Great care must be taken in poor weather. Pick a good day and the traverse of the complete ridge is an awesome expereience. If you have a head for heights have a sit down on Lord Berkleys seat where the views are magnificent. The traverse can be tackled from either end but the route from Sail Laith is the best.

A full written account of a climb submitted by our members.

You can prepare your own write up by first making an entry in your route log and then visiting the logging section above.

 Route Write-Ups
  Date Title Written by Including...
1 10 Jun 2012 Bidein a’ Ghlas Thuill and Sgurr Fiona from Dundonnell; 1 June 2012. Roger Vander Steen Bidean a' Ghlas Thuill Not Yet Rated
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