Historical clue formulations

• ___ monster (Southwest reptile) — 2026-03-17
• ___ monster — 2025-11-21
• ___ monster (only venomous lizard native to the U.S.) — 2025-08-26
• Cold-blooded kind of monster — 2025-04-17
• Tributary of the Colorado River — 2025-02-09
• New Mexico's ___ National Forest — 2024-09-11
• ___ monster — 2024-05-02
• ___ monster — 2021-08-31
• ___ monster — 2020-05-28
• ___ monster — 2020-01-18
• Kind of monster — 2019-12-29
• River to the Colorado — 2019-07-10
• River that meets the Colorado at Yuma — 2019-05-31
• Colorado feeder / Sacha Baron Cohen character — 2019-04-09
• ___ monster — 2018-03-29
• ___ monster (desert denizen) — 2018-01-15
• Tributary of the Colorado — 2017-05-17
• Sonoran Desert river — 2016-12-01
• ___ monster (desert lizard) — 2016-11-07
• ___ monster — 2016-02-17
• Colorado tributary — 2016-01-07
• River to the Colorado — 2014-07-18
• River of Phoenix — 2013-03-24
• Arizona county or river — 2012-08-15
• Colorado feeder — 2011-02-16
• ___ monster — 2010-09-06
• Arizona's ___ Mountains — 2009-10-01
• River of Yuma and Phoenix — 2009-09-05
• Arizona county or river — 2008-06-12
• Tributary of the Colorado — 2008-01-15
• Grand Canyon State stream — 2007-10-14
• Coolidge Dam's river — 2006-06-10
• River to the Colorado — 2006-06-07
• Coolidge Dam river — 2006-04-02
• Colorado feeder — 2005-07-30
• Arizona river — 2005-04-20
• Arizona river — 2004-07-01
• ___ monster — 2003-08-18
• Coolidge Dam's river — 2002-12-28
• Southwestern river — 2002-06-03
• Tributary of the Colorado — 2001-03-16
• Kind of monster — 2000-09-26
• ___ monster — 2000-02-07
• River to the Colorado — 1999-06-13
• Colorado feeder — 1998-08-27
• ___ monster — 1998-05-18
• ___ monster — 1996-10-16
• Arizona river — 1996-02-14
• Colorado tributary — 1995-11-19
• Type of monster — 1995-11-06