The highest points on Dartmoor are on the northern moor: High Willhays, , (grid reference ) and Yes Tor, , (grid reference ) The highest points on the southern moor are Ryder's Hill, , (grid reference ), Snowdon , (grid reference ), and an unnamed point, at (grid reference ), between Langcombe Hill and Shell Top. The best-known tor on Dartmoor is Haytor (called Hey Tor by William Crossing), , (grid reference ). For a more complete list see List of Dartmoor tors and hills.