Historical clue formulations

• Valley — 2026-09-16
• Valley with gentle slopes — 2026-09-05
• Low-lying landform — 2026-05-27
• Valley — 2026-02-23
• Secluded valley — 2025-10-21
• Secluded valley — 2025-09-07
• Narrow valley — 2024-07-22
• Secluded spot — 2024-05-03
• Valley — 2023-04-06
• Campbell with the 1975 #1 hit "Rhinestone Cowboy" — 2023-01-12
• Watkins ___, N.Y. — 2022-09-14
• Secluded narrow valley — 2022-08-23
• Quiet valley — 2021-10-03
• Secluded valley — 2021-07-06
• ___ Oaks, neighborhood in eastern Queens — 2020-08-14
• A stream might run through it — 2020-07-17
• Secluded valley — 2019-10-20
• Hidden valley — 2019-09-20
• Country/pop singer Campbell — 2019-02-18
• ___ Rock, N.J. — 2018-08-10
• Campbell who sang "By the Time I Get to Phoenix" — 2018-05-14
• Place for a stream — 2018-03-29
• Verdant spot — 2018-03-04
• "Galveston" singer Campbell — 2018-01-29
• ___ Rock, N.J. — 2017-03-17
• Narrow valley — 2016-12-22
• Vale — 2016-12-04
• Secluded valley — 2016-09-19
• Secluded spot — 2016-09-03
• Secluded valley — 2016-06-06
• Highland lowland? — 2015-10-10
• Secluded stream site — 2015-08-08
• Narrow valley — 2014-12-22
• Secluded valley — 2013-03-25
• Secluded valley — 2012-05-21
• Isolated valley — 2011-10-18
• Spot for a stream — 2011-01-09
• Campbell who sang "Rhinestone Cowboy" — 2010-07-12
• Hidden valley — 2010-06-09
• Valley — 2010-04-25
• Secluded valley — 2009-12-22
• Narrow valley — 2008-08-05
• Secluded area — 2008-07-23
• Place between hills — 2008-06-08
• Hidden valley — 2008-03-17
• "Galveston" crooner Campbell — 2007-12-31
• Rustic-sounding man's name — 2007-05-19
• Secluded area — 2006-11-22
• Secluded spot — 2006-11-02
• Arizona's ___ Canyon Dam — 2006-09-22