Slackdhu above Strathblane. More effort than most Lowland crags to get to! But a good location.
Red is the best line - up the rough track (to base of 2005 landslip), then traverse grass and scree to the crag.
Yellow is best when the summer bracken is up. Take the steep-sided stream between the houses onto open moor: bit more slog, avoids most bracken, - worth it.
Green - is a bit too long but avoids most bracken by going high. Have done it but yellow is better.

That's useful; thanks!
Is it worth it when you get up there?

Is Red starting at the War Memorial and Yellow behind the Kirkhouse? Been tempted for a while now to go up there for a wander.

All lines start at the war memorial and up the private road. The yellow cuts down into the stream at the first big bridge in about 100m (jump over wall, scramble in). Not clear in the photo mind you

I've always enjoyed this place, so I might be biased. Rusty Pegs is E1 5b, maybe best route. Steep and good value for the length, good gear but fiddly. Tendons HVS also good - big holds and big gear. Other E numbers are generally bold. Worth a root around in the lower grade stuff too, generally chimneys and pinnacles but maybe more scrappy? And a really nice place to be on a good weather day.

Ah gottcha now, thanks for clarifying the geography. Despite living round this area for decades I've never been up the Campsies, other than going along the main path to eventually drop back down into Killearn. Next dry day I'll maybe give it a shot.