Map sheet number OL21 in the OS Explorer series covers an area of the Pennines &
Includes:: Burnley, Hebdem Bridge, Todmorden & Keighley With this map you will receive a code for use on your i OS or Android smartphone or tablet. Find our more at Mobile Download FAQ. This area is criss-crossed by footpaths, including the Pennine Way & Calderdale Way. The highest peak is Lad Law at 517m. The OS Explorer map for South Pennines is available in both the standard paper version & weatherproof ' Active' version.