Lemon Pop is the best of four winners out of Unreachable (Giant's Causeway), who has had six runners.

The second dam Harpia (Danzig) was a multiple graded stakes winner whose successes include the Grade 3 Shirley Jones Handicap at Gulfstream Park, and she has produced four winners, among them Dundonnell (First Defence), winner of the Gr.3 Acomb Stakes. She is a full sister to five black-type horses, headed by the hugely influential sire Danehill, winner of the Gr.1 Sprint Cup, the graded stakes winners Eagle Eyed and Shibboleth and the stakes-placed Anziyan and Quick To Please. She is also a half-sister to Euphonic (The Minstrel), winner of the Listed Prix Amandine.

The third dam Razyana (His Majesty) was twice placed and went on to produce nine winners.

Unreachable is also the dam of an Ontario-bred colt by Maclean's Music.