Over the last couple of winters we noticed that a number of groups offered trips to Sawmill Burn. So yesterday we tried to find the way up the old logging roads. Unfortunately no one had been up there this year, so once we left the ski trail we were trail-breaking through increasingly faceted snow. We got almost to the burn area before lack of time and energy forced us to turn back.
The route leaves the ski trail at the top of the hill by a circular red trail marker (see map) and soon heads steeply uphill before swinging round to the right and flattening out a bit. We made the mistake of turning left at the next junction on an old road that climbs steeply then heads left toward the valley. We went back down to the junction and continued on the original line after crossing several large logs. The old road climbs to an open corner with good views, heads left a short way, then back to the right at the far end of a relatively open area. We got a few hundred metres farther, to where the road is very overgrown, before turning back.
When we got home we looked at some air photos from 1983 that show the logging roads. I have reproduced one here showing where we got to. Hopefully it will help an energetic group find the route to the ridge. Let me know if you do. If you send me a gps track (gpx format) I will redo the map and post it and the track log for the benefit of others.