The circuit of Loch Ossian, climbing the three Munros of Carn Dearg,
Sgor Gaibhre & Beinn na Lap, is only 10% more
effort than a trip up Ben Nevis.
Beinn na Lap is a very short walk on its own, being just six miles and 550m of ascent.
It is easily omitted from the round, saving 3.6 miles and the 550m ascent.
Such an omission is a good safety margin if a train needs to be caught at the end of
Heading SW from Corrour Lodge, it is debatable where the best point is to leave the track along Loch Ossian to ascend Beinn na Lap. The main obstacle is the forestry. One possibility is to follow fire breaks from NN40666958 to NN40346963 and then a mile of bogland before the main ascent starts. This would save 2½ miles along the good lochside track, and substitute 2 miles of mountain path with 2 miles of pathless ground. However, the start of the fire break is difficult to find without GPS.
Transport A fit person can easily complete the walk between the first and last trains to Corrour Station, obviating the need to use the Youth Hostel or a return trip to complete the Munros there – until, of course, you want to return to do them again! The only problems are that there are too few trains to do it on a Sunday, and you'll probably have to skip either a cooked breakfast or an evening meal on the day you choose.
Here is the ScotRail timetable as of August 2016. Then the times had not changed by more than a few minutes over the decade that had passed since I did the walk. I recommend taking the earliest train. Then you should be able to catch the second last train back to an evening meal, giving 9½hrs for the walk. The last train is there as back-up and saves carrying gear for a night at the youth hostel.
There are a number of miles of excellent track, especially on the north side of
the loch, and quite a few miles of good paths.
Some poor ground, mostly at the start of the walk, but not too much of it.
The notes below give the detail of this.
Weather: 10°C at car; overcast, occasional light showers, cloud base 700-800m.
|0855||Arrive at Corrour Station||410||0||0.0 miles||No Orange|
|0910||Track ENE to Youth Hostel at Loch Ossian||390||1.1 miles|
|0945||Wet, peaty track E to Peter's Rock||515||130||2.5 miles|
|E/SE without path over wet, peat hacks to:
M Carn Dearg NN417661
Hereafter good, firm ground with fast path along ridges.
|ENE to Pass at Mam Ban||725||565||5.37 miles|
|ENE to M Sgor Gaibhre||955||800||6.2 miles||weak Orange|
|1155||NNW to Bealach nan Sgor||802||6.5 miles|
|N to T Sgor Choinnich||929||925||6.8 miles||No Orange|
Head WNW directly towards Corrour Shooting Lodge.
Good firm terrain down to 700m, then poor wet peaty slopes.
At bottom, go along track into forest, ignoring the pigeon
shooting sign else you end up in very wet, deep bogs.
|Bridge over R. Ossian at NE end of L.Ossian||395||950||9.2 miles|
|1400||Take excellent, surfaced, logging road round the Lodge, then
SW along NW edge of loch to end of forest, NN36916740
The road can be left earlier – see above.
|NW to main path, path N to ridge, then NE
up ridge to M Beinn na Lap
|1600||Return SW down ridge path, then
S to road at road junction by Ruigh Nighean Ailein
(Path not always obvious, but easy slopes & terrain.)
|1620||S to road junction near Youth Hostel||390||16.35 miles|
|1635||Return WSW back to Corrour Station||410||1545||17.2 miles||No Orange|