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Circuit of Loch Ossian: Carn Dearg, Sgor Gaibhre & Beinn na Lap
Map 385W, 12 May 2006

Route: 17.2 miles, 1535m=5035' ascent, 7hrs 40mins.


Corrour Station with wind generator. 
Leum Uilleim (909m) behind. The view looking east over Loch Ossian. The summit cairn of Beinn na Lap. The impressive new shooting lodge at the E end of L.Ossian. An interesting boulder at the NW corner of L.Ossian.

Route 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 the day.
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.

StationMon-SatMon-Sat Mon-SatMon-Sun
Crianlarich0747102114242020
Tyndrum Upr0800103214352031
Corrour0859*112115242120
Spean Bridge0939115515562153

* = Request stop. Speak to guard when buying ticket on train.

StationMon-SatMon-Sat Mon-SunMon-FriSun
Spean Bridge07571156175120101920
Corrour08321230182520522001
Tyndrum Upr09231319191421532106
Crianlarich09311327192222052118

Terrain: 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   00.0 milesNo Orange
0910 Track ENE to Youth Hostel at Loch Ossian 390 1.1 miles 
0945 Wet, peaty track E to Peter's Rock 5151302.5 miles 
1040
-1045
E/SE without path over wet, peat hacks to:
M Carn Dearg NN417661
Hereafter good, firm ground with fast path along ridges.
9415554.25 milesOrange
1115
-1120
ENE to Pass at Mam Ban 7255655.37 miles 
1140
-1145
ENE to M Sgor Gaibhre 9558006.2 milesweak Orange
1155 NNW to Bealach nan Sgor 802 6.5 miles 
1205
-1210
N to T Sgor Choinnich 9299256.8 milesNo 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.
    
1305
-1310
Bridge over R. Ossian at NE end of L.Ossian 3959509.2 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.
39098012.5 miles 
1510
-1515
NW to main path, path N to ridge, then NE
up ridge to M Beinn na Lap
937152514.25 milesOrange
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.)
410 16.05 miles 
1620 S to road junction near Youth Hostel 390 16.35 miles 
1635 Return WSW back to Corrour Station 410154517.2 milesNo Orange


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