Mind was on other matters. Short leg so stopped concentrating. Looked ahead at the ridge and saw nothing but rock. Looked at the map and saw no rock. Thought I must have run past the gully by being a little too high. ran up to find the track. No sign of it. So went to the top to make sure and up there it was all obvious. The extra rock and the missing track I put down to control burning. Will bear that in mind in future.
Wasn't there, but just wish to say that there a control near #4 when the last SS was held on this map (last year?) and l did an almost identical thing - ' what's all that rock' , then went up the hill to make sure l was in the right spot.
Before the burning ridges such as this were covered with grass. This hid the rocks. No excuse though. Should have concentrated upon the contours.