The walk
A pleasant, unhurried Munro above Strath Fillan: an out-and-back up a long, gentle ridge with a fence for company, very boggy low down, drying as you climb, with one genuine navigational moment — the cleft that splits the ridge before the summit dome — and a false top to be mindful of. The reward is the summit itself: a cool wee vantage point over the Central Highlands. And you start past a priory founded by Robert the Bruce.
Very boggy lower slopes — expect to zig-zag around the worst of the swamps; a fence on your right marks the line. Dries out with height. Undulating ridge, no technical ground, nothing arduous. The cleft before the summit needs care in poor visibility.
Physical ModerateNavigation ModerateTechnical EasyExposure EasyTerrain Ridge, bog, path
1A82 layby, the railway and St Fillan's Priory
0 to 1.37 km · 196 m upFrom the layby, cross the West Highland Line and pass Kirkton Farm to pick up the hill path. Just here you walk past an old graveyard worth a pause: this is St Fillan's Priory, founded in 1317–18 under the patronage of Robert the Bruce and dissolved in 1607 — now a scheduled monument of national importance. The burial ground sits on a circular mound that may be a Bronze Age cairn, with medieval grave slabs among the later stones, one carved with three Latin crosses. Then the path turns uphill.
The long boggy ridge, fence on your right
1.37 to 4.92 km · 650 m upThe bulk of the climb: an easy-going, undulating ridge with a fence on your right marking the way almost the whole time. Low down it is very boggy — at times you'll need to zig-zag to avoid the worst of the swamps — but it begins to dry out as you gain height. Nothing technical, nothing arduous; a steady pull of about 800 m up to the South Top (998 m) — which you go over, not around. Be mindful: this is the false summit; the true top is still 0.7 km on.
Bog. Very wet low down — zig-zag around the worst of it.
The cleft and the summit dome
4.92 to 5.73 km · 68 m upBeyond the South Top you come to a cleft that splits the ridge — the one real objective hazard of the day. In poor visibility take care here: the split has one mound rising on the right, while the ridge itself carries on to the left-hand side. Walk along the top of it and you'll drop some height, with the summit dome looming ahead. A final pull up the dome and you're on Ben Challum (1,025 m).
The cleft that splits the ridge: in poor visibility, the ridge continues on the LEFT — the mound on the right is not the way.
The summit
A cool wee vantage point: the reward of the day, with the Central Highlands spread around you. Take it in before turning for home.
Back the way you came
5.73 to 11.75 km · 69 m upA genuine out-and-back: retrace the ridge, taking the same care at the cleft, then back down the long boggy slopes with the fence now on your left, past the priory and over the railway to the layby.
The cleft again on the way down, then the bog.
Before you go
- The cleft before the summit dome is the hazard in poor visibility — the ridge continues on the left.
- The South Top is a false summit; the true summit is 0.7 km further on.
- Very boggy low down — gaiters and a tolerance for zig-zagging.
If you need to turn back: None needed and none specific — it is an out-and-back; retreat is simply back down the ridge the way you came.
A pleasant day, just boggy. Loved it — will go again. — Robert