OS Explorer Map 269 covers Chesterfield, Sutton in Ashfield & Alfreton. There are a number of Country Parks to discover, as well as part of the Trans Pennine Trail. The Five Pits Trail at Grassmoor is surfaced & open to cyclists, walkers & horse riders. 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. The OS Explorer map for Chesterfield & Alfreton is available in both the standard paper version & weatherproof ' Active' version.