Lovely picture, full wings! you are braver than I, or you knew the territory very well indeed.
Although I have flown from time to time in mountains, always had a bit more margin. In the Alps, no matter how close you fly to the mountain to get the best lift, coming round the corner there was always a French glider even closer to the rocks!
And going up the valleys - we flatlanders were thoroughly briefed before heading that way, where we could find landable fields.
One flatlander was following another glider flying into a deep deep valley, every minute becoming more interesting, but expecting the French glider would know the territory and so following him he would be safe. About then, the French glider deployed his engine (which had been stowed in the fuselage) and climbed away....