Historical clue formulations

• Racehorse ___ Ridge — 2004-10-07
• ___ Ridge (1972 Derby winner) — 2004-06-24
• ___ Ridge (racehorse) — 2003-10-11
• 1972 Kentucky Derby winner ___ Ridge — 2002-03-13
• 1972 Kentucky Derby winner ___ Ridge — 2001-03-06
• Horse-racing Hall-of-Famer ___ Ridge — 2000-12-21
• 1972 Kentucky Derby winner ___ Ridge — 1999-11-26