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Ben Oss

Munro
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.
Altitude
1029 m (3375 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.
NN28782536
An indication of this mountains height rank within its class. Where two mountains share the same height they are ordered alphabetically.
Stature
101 of 282 Munros
The number of ascent routes currently available on Munromagic.
Routes
1
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.
Meaning
Hill of the loch-outlet
 

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
  50   Glen Orchy & Loch Etive
 

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

  Description
Ben Oss and Beinn Dubhcraig form a curved ridge around Loch Oss and are generally climbed together. Ben Oss has craggy sections and many rocky outcrops, particularly on its N face overlooking Glen Cononish.

Ben Oss is usually accessed from Glen Cononish to the N via Beinn Dubhcraig, although an approach could be be made from Gleann nan Caorann in the S.

Ben Oss's two N ridges are craggy and generally avoided as they are steep and rocky therefore the best alternative descent is S then SW to Creag Dubh a' Bealach where Ben Oss meets the lower slopes of Ben Lui and descend NNW through Coire Laoigh to Glen Cononish.

Hazards you may encounter on Ben Oss include
 Stony/rocky Slopes on or near ascent routes.
 Crags on or near ascent routes.
 Crags near summit.
 
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 Ben Oss

Looking back from the summit of Ben Oss towards the summit of Ben Lui. The bump to the left is Beinn a' Chleibh. In the background is Ben Cruachan.

© Craig Robinson
Image by Craig Robinson

Ben Oss with Ben Lui behind from Ben Dubhchraig.

© John MacBean
Image by John MacBean

View towards the south and Loch Lomond from the summit.

© Katerina Braun
Image by Katerina Braun

Ben Oss on the left looking south from the summit of Ben Lui (in the right hand foreground) taken 29th December 2008.

© Duncan Mackison
Image by Duncan Mackison
View All 15 Images for Ben Oss

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

Ordnance Survey digital maps are also available to members.

  Weather & OS Maps
West Highlands
by MWIS (PDF format) 		West Highlands
by Met Office 		Ben Oss
by Metcheck
Ben Oss 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 Ben Oss.

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

  Routes that include Ben Oss
  Ascent Distance Time Including... Description Rating
1 1438 m 19.25 km 6.5 hrs Ben Oss and Beinn Dubhchraig  Not a difficult route once you have negotiated the forest. Ben Dubhcraig is rocky on the southern face but this is avoided.  
 

Pictures submitted by members on the summit of Ben Oss

  Baggers Gallery for Ben Oss

Ben Lui from the summit of Ben Oss

© John Philip
Image by John Philip

Billy and me at the top of Ben Oss with Beinn Dubhchraig behind, to the right Ben More, Stob Binnein and Cruach Ardrain and to the left in the distance Ben Lawers.

© John MacBean
Image by John MacBean

Billy and me at the top of Ben Oss with the sun setting behind Ben Lui.

© John MacBean
Image by John MacBean

Billy at the top of Ben Oss.

© John MacBean
Image by John MacBean
View All 30 Baggers Images for Ben Oss
The logging section stores any entries for Ben Oss in your own log. From here you can
  1. Add a route log entry that includes this mountain
  2. Write a full account of your route including photos
  3. Edit an existing log entry including uploading a GPX file or add a photo
  4. Delete your log entry
  Logging
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Recently Climbed By
Graham Smyth on 13 Apr 2024
Douglas Robertson on 10 Jan 2024
Liam O'Hagan on 10 Jun 2023
Arlene Johnston on 13 May 2023
Alasdair Cairns on 18 Apr 2023

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
 
Beinn Dubhchraig and Ben Oss
by Doug Tulloch
Ben Oss and Beinn Dubhchraig
by Geert Gritter
Beinn Dubhchraig, Ben Oss, Ben Lui and Beinn a' Chleibh
by Stephen Maddocks
Beinn Dubhchraig and Ben Oss
by Kenny Mcneill

Post a few words about Ben Oss or read what others have had to say.

 Comments
 
James Corrigan
wrote on
April 10, 2011
Completed Dubhcraig a few weeks ago indeep snow so ran out of time for Ben Oss.Revisist to Dalrigh and on to Alt Coirie Dubhcraig after the sharp right turn over the rail bridge.This is the start of a very long, very wet approach through the pretty woodlands.Nice waterfalls help to forget the sodden underfoot conditions.Took to the SW ridge of Dubhcriag where you have some stunning views of Ben Lui and target of the day. Ben Oss.There is a very large drop "Col" between the 2 hills with South path to right of the large Lochan.Heading back North and directly up by any means takes you to a steep rocky section and on to the summit.Continued North wards and back to the large drop.The only way back if you are going to Dalrigh is to re ascend Dubhcraig on the obvious path.Do not continue North as it leads to dangerous crags with sheer drops! Demanding day but worth it for those views of Ben Lui.
Roger Vander Steen
wrote on
August 6, 2006
A long approach from the end of the track beyond Cononish. The east bank of Allt Coire Laoigh was straightforward after a dry spell. If approaching from Beinn Dubhcraig, there is a tempting path from the col with Ben Oss which veers off to the left; it is not helpful and it is better to aim for higher ground directly. Descending the north ridge of Beinn Dubhcraig we strayed too near Creag Bhocan and overshot the usual very muddy route. This was not a problem: although not on a path we were at least on dry ground.
Colin Bell
wrote on
March 26, 2006
Climbed this with its neighbour Dubhcraig on 19/2/06. Took the longer route along vehicle track in Glen Cononish towards Ben Lui - wonderful views of the snow clad NE corrie and ridges. 7.5km but easy walk to start the day. Followed the gorgeous glacial valley of Allt Coiire Laoigh - many stream gullies to be crossed but got into a rhythm of holding the contour line round each. Snow & crampons from below the bealach onwards. Retraced steps off Dubhchraig for 250m then NNW, down and N in straight line to bridge at Cononish. Back down track to Dalrigh. 13 miles,tiring but great & not muddy!
Colin Speirs
wrote on
April 12, 2004
The start is the most awkward aspect of this Munro. After crossing the railway and passing through the gate turn directly to the right and follow the boggy path to the footbridge over the river (do not follow the farm track as it's a long detour). Head up through the forest (boggy) and over the two deer fences and stiles and onto the path proper. The ascent of Dubhcraig is straightforward followed by a descent and then ascent of Oss. Unfortunately it's a reascent of Dubhcraig to pick up the path back to the car park. A long slog of a hill with boggy ground on many stretches.
 
 

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

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