Historical clue formulations

• U.S. state capital with the highest altitude (7,200 feet) — 2024-11-29
• Terminus of a 19th-century "Trail" — 2012-06-30
• Onetime home for Georgia O'Keeffe — 2010-12-26
• Home of the Museum of International Folk Art — 2008-07-12
• Capital of New Mexico — 2006-12-04
• Old trail terminus — 2004-01-23