The short climbs over the three bumps, Cringle Moor, Hasty Bank and Cold Moor, can be avoided by using the Jet Miners’ Track which vaguely contours around the hillside following the strata in which jet is found. It’s quite a muddy track, following the tree line and staying within the shade.
Jet is the fossilised remains of the monkey puzzle tree dating from the Jurassic period. It’s a hard black material easily carved into jewellery and made famous by Queen Victoria when she went into mourning following the death of her husband, Prince Albert. That fashion lasted a mere twenty years but jet has long been valued for its ornamental, superstitious and supposed medicinal qualities. Pieces have been found in archaeological digs and dated to 2,000 B.C. but these would probably have been found as pebbles on beaches. Yorkshire jet has been found on Roman sites in Europe. Jet mined from the Cleveland Hills would have found its way to Whitby which in the 19c became well known for its jet trade.