https://nl.wikivoyage.org/wiki/Wandelroute_GR-131
https://www.cicerone.co.uk/infinite-variety-the-gr131-across-the-canaries en https://www.cicerone.co.uk/gr131-canary-islands (deze gaat meer over de GR131)
https://www.bol.com/nl/p/trekking-in-the-canary-islands/9200000132512916/?c2a=buy#productTitle
32 etappes
GR 131 Stage 1. Puerto de Tazacorte – Roque de Los Muchachos