I (Matthias Ekman) will be attempting to set the self-supported FKT for the HRP, starting on Saturday July 14th. More info about my attempt can be found here: https://sites.google.com/view/matthiasekman/running/hrp-fkt-july-2018
Route: Haute Route Pyrenees (Spain, Andorra, France)
The Haute Route Pyrenees (HRP) follows the French and Spanish border, starting in Hendaye on the Atlantic coast and finishing in Banyuls-sur-Mer on the Mediterranean. Large sections of the route remain unmarked.
The original HRP route was devised by Georges Véron in 1968 and later adapted and popularised by Ton Joosten’s guidebook "Pyrenean Haute Route" (Cicerone Guide). The HRP described in the 2nd edition of Ton Joosten’s book has total distance of approximately 500 mi (800 km) and an estimated elevation change of 183,000 ft (55,800 m).
Like with other famous trails, there is not one single HRP route, but variants exist and it is possible switch between the high-route and lower alternatives on the GR 10/GR 11.
Note that the "Pyrenees Crossing" route taken by Kilian Jornet in 2010 is different. It has some overlap with the GR10 and GR11.
The map & GPX file are from http://doingmiles.com/2010-07-hrp/ which has an excellent report from a 5 week backpacking trip on the route.