What follows is not very easy to describe and should be carefully noted. What you have to pick out is a particular col on the opposite slope beyond the stream. This col is three miles or so from the fork, five from the Refuge, and is called “the Col de Gistain.” As you go up this valley the opposing side is formed of the buttresses of the Posets. From that mountain four torrents descend to join the east fork of the Cinqueta, between the place where you crossed and the col you are seeking. The first torrent falls into the valley which you are climbing half a mile or so after you have crossed the north fork and begun the new valley; a second comes in about a thousand yards further on, a third about a mile further yet, and you may see each of them coming into the stream at your feet from down the opposing side, which consists, as I have said, in the buttresses of the Posets.
Another way of recognizing these three torrents (and it is essential to recognize them) is to note that between the first and the second the slope is not violent, while between the second and the third it is a rocky ridge.
When you have seen the third come in, you must watch exactly a mile further on for the entry of the fourth. This fourth one is your mark by which to find the col. Just after passing in front of the mouth of this fourth torrent, your path, such as it is, will cross the Cinqueta, turn sharply eastward, and begin to climb up the right or northern bank of this fourth torrent.
The ascent is not steep, and in 1500 yards you are on the Col de Gistain between 8200 and 8300 feet above the sea, and almost exactly 3000 feet above the spot where you left the north fork of the Cinqueta to follow the eastern valley. Another way of making certain that you do not miss the all-important turning is to count the torrents coming in upon your side, the north side, of the valley; that is the torrents, each coming in from its own ravine, which your path crosses.
They also are three in number and fairly equidistant one from another, the first about a mile after you have crossed the north fork, the next a mile further on, and the next just under a mile beyond that. It is after you have crossed the third and have proceeded another 500 or 600 yards that your path to the Col de Gistain will go off opposite to the right, crossing the stream at your feet, and following the torrent that falls from that opposing side.
Yet another way of making sure is to watch (if the weather is fine) for the col itself, an unmistakable notch with a ridge of sharp rock just to the north of it and a less abrupt arète going south of it up to the summit of the Posets.
I have written at this length of the passage not only from the difficulty of discovering, but also from the danger that will attend any delay in finding it. If you go on past the turning where the path to the col goes off eastward you may get over the wrong port on to the French side, miles from anywhere, or you may take the rocks of the Anes Cruces and find yourself on a ridge beyond which there is no going down either way; while if you turn off too early you may climb right up on to the glacier of the Posets, and lose a day and be compelled to pass a night in that frost.
Once you have got to the top of the Col de Gistain, however, you are free. All the running water below you leads you down into the valley of Venasque; there is no steepness and no difficulty. The rudimentary path follows the stream, there is a little cabane on the upper waters of it, soon the floor of the valley widens out a trifle, and four miles on, not quite 3000 feet below the pass, is another cabane; that of the Turmo. The path from this point becomes more definite; it crosses the stream 2 miles down in order to avoid rocks upon the southern side, recrosses it again a mile later to negotiate a steep and narrow gorge, it comes over once again to the northern side by a bridge a few hundred yards further on, and almost immediately reaches the valley of the Esera at a point 9 miles or so from the summit of the pass. Here an ancient and remarkable bridge, the Bridge of Cuberre, crosses the Esera, and enables you to gain the wide mule track to Venasque, which town lies rather more than 2 miles down the road.
It will be seen that the whole difficulty of this passage lies in making certain of the Col de Gistain.