Possible Clues:

• Extensive range used by B. Traven
• - - Leone
• In south Africa I go wrong with the mountains of Spain
• (Spanish) mountain chain
• A Spanish mountain chain (6)
• Mountain chain, S (radio comms.)
• I go astray in South America - the territory's mountainous
• 'High ___' (Bogart classic)
• A range of mountains in Spain
• Jagged mountains - code word for S