Historical clue formulations

• Texas city on the Rio Grande — 2024-09-25
• Texas terminus of I-35 — 2023-03-19
• Texas border city — 2021-10-24
• Capital of the onetime Republic of the Rio Grande — 2020-09-18
• City on the Mexican border — 2018-12-28
• Texas city seen in many westerns — 2018-12-10
• U.S. city that hosts the world's largest jalapeño festival — 2017-11-25
• Southernmost city on I-35 — 2016-09-02
• Rio Grande city — 2016-02-28
• City in old westerns — 2014-10-11
• Texas city — 2013-10-08
• Home of Texas A&M International University — 2012-04-21
• Texas city on the Rio Grande — 2012-02-20
• Annual Jalapeño Festival site — 2011-12-24
• Its streets are immortalized in a classic cowboy ballad — 2009-04-04
• Rio Grande port — 2009-04-01
• U.S./Mexico border city — 2009-02-25
• 1960s TV western — 2008-05-09
• "Streets of ___" (classic cowboy song) — 2008-02-25
• Major U.S./Mexico border crossing — 2006-05-30
• 1960's TV western — 2004-02-04
• "Streets of ___" (cowboy song) — 2003-07-29
• City on the Rio Grande — 2003-01-19
• City on the Rio Grande — 2002-09-23
• Rio Grande city — 2002-02-17
• Texas border city — 2001-12-04
• U.S.-Mexico border city — 2001-01-04
• Neville Brand western — 2000-02-20
• Rio Grande city — 2000-01-30
• Texas city on the Rio Grande — 1998-06-18
• 60's series set in post-Civil War — 1997-05-18
• Town in many an oater — 1997-01-26
• Texas city on the Rio Grande — 1996-02-14
• Neville Brand TV western — 1994-04-10