Park at Basses Graves in a small space by the roadside, just past the recycling bins.
Warning! This walk includes some very technical sections. Please refer to the hikers’ comments below.
(S/E) Set off westwards towards the Sagnières aqueduct and the Vermeil torrent. After skirting the meadow, follow the path into the forest (you’ll need to pass through two horse fences).
(1) Turn right at the end of this fence (do not turn left towards the mountain bike markings) and you will soon reach the Sagnières aqueduct and stream, which you’ll approach on a descent, followed by the Combe Chabrières stream. The path runs along the right bank; follow it for about 150 metres to reach a junction.
(2) Leave the main path and turn right onto a path that climbs in switchbacks; the gradient remains gentle until around the 900-metre mark. Continue northwards to reach the ridge line towards the 1,016-metre altitude. Further on, the path is overgrown with tall broom, through which you’ll have to force your way, followed by fallen fir trees that you’ll need to climb over. You can also take the ridge line before reaching these obstructions and rejoin the path further on. Shortly afterwards, ignore a path branching off to the right which descends directly to Les Hautes Graves.
(3) Continue north-east. The path then veers west to tackle the slopes of Coste Longue via a very wide hairpin bend. You will then emerge onto the key section of the ascent.
(4) The path crosses the top of a ravine, which is a little exposed for 20 metres. Once past this section, the path narrows whilst still in the forest, then crosses a scree slope (1 cairn). From there, the path is less clearly defined, but you must maintain the diagonal ascent for 80 metres and climb straight up the slope to quickly rejoin the well-marked, level path.
(5) This path veers off to the far left (west), running almost level and clearly visible once more. Gradually, the terrain changes. Above the forest, the path becomes stony and easy to follow, winding through two large hairpin bends, always with a gentle gradient.
(6) At around 1,300 metres, it continues north-east: either try to follow it or climb up via the numerous animal tracks to reach the vicinity of the ridge line, which you then follow to the summit of Bramefan (this option is shown on the map).
(7) For the descent, continue along the ridge line to the secondary summit to the east.
(8) Head south-east along the gully to the Col de la Basse.
(9) Head south, passing close to a ruin which you leave on your right. The path veers slightly to the left to go round a hillock and reach the 1379m point. From there, the path heads west-north-west, then curves widely through the forest before turning south. It gradually becomes steeper, eventually joining a forest track.
(10) Follow this track downhill to reach Les Hautes Graves. From there, take the road back to the starting point (S/E).
