Car park at Port de Balès (1755m).
(S/E) Head west towards Mont Né along a narrow path that runs alongside the road for around 100 metres, then heads towards the Mont Né Refuge.
After a few minutes, join the pastoral road that leads to the refuge (this road, which is in poor condition, is reserved for shepherds' vehicles). Follow this road to the Refuge du Mont Né.
(1) Continue along the GRP® to Port de Pierrefite (1857 m).
(2) At Port de Pierrefite, you can see the Cromlech overlooking the Oueil valley below. Continue along the GRP® towards Lac de Bordères (de Bareilles). You need to cross the cattle fence that marks the "border" between the Haute-Garonne and the Hautes Pyrénées. There is an open passage for hikers.
Then head down towards Lac de Bordères (de Bareilles) along a narrow path.
After about 500 m, the path becomes harder to find, although it is signposted, it has been gullied down the steep slope, on sometimes slippery schistose rock. You have to be careful where you step to avoid slipping. This tricky section only lasts about fifty metres, then the path becomes easy again, still downhill towards the lake, before climbing a little on the last section of the route.
(3) The lake emerges with its clear turquoise waters when the sun is shining. In summer, you may come across free-roaming horses watering here.
Take the same route back to the Port de Balès car park (S/E).