The detailed Ordnance Survey map for the area is:
Landranger 23
North Skye, Dunvegan & Portree
ISBN: 0319 223426

Explorer Map 408
Skye – Trotternish & The Storr
Uig

Grid reference for Duntulm is:
NG 415 745
Latitude 57° 41.0′ N
Longitude: 6° 20.21′ W

You may also find these ‘Landranger’ maps useful if you plan touring the island:
32 – South Skye & Cuillin Hills
ISBN: 0319 223523
33 – ‘Loch Alsh, Glen Shiel & Loch Hourn’
ISBN: 0319 223558

‘Travelmaster 3 Western Scotland and the Western Isles’ 1:250 000 scale