Historical clue formulations

• Colorado resort town — 2026-07-29
• Ski town that shares its name with a tree — 2025-12-05
• Colorado ski resort — 2025-04-01
• Tree with "eyes" on its bark — 2024-03-03
• Colorado city known for skiing — 2023-08-22
• Rocky Mountain town — 2023-08-20
• Peaceful quaker? — 2023-07-20
• Colorado ski resort — 2022-10-11
• Quaker of Pennsylvania? — 2022-07-22
• Western resort town on the Roaring Fork River — 2021-08-17
• White-barked tree — 2021-06-17
• Source of heart-shaped leaves — 2021-05-21
• Harry and Lloyd's road trip destination in "Dumb and Dumber" — 2021-04-10
• Resort near White River National Forest — 2020-12-11
• With 58-Across, quaker in the woods — 2020-07-30
• Colorado resort — 2020-06-08
• Colorado skiing mecca — 2020-03-09
• Wood that's good for matchmaking — 2020-02-02
• Poplar variety — 2019-08-14
• Western city that shares its name with a tree — 2019-06-07
• "Quaking" tree — 2018-10-08
• ___ Institute (nonpartisan D.C. think tank) — 2017-10-25
• Home to an annual Ideas Festival — 2017-08-10
• Wood that doesn't burn easily — 2017-05-25
• "Quaking" tree — 2017-05-22
• Tree known scientifically as Populus tremuloides — 2017-03-03
• "Dumb and Dumber" drive destination — 2017-01-21
• Tree that can survive forest fires — 2016-12-23
• White-barked tree — 2016-08-07
• Winter X Games host city — 2016-04-01
• Quaker of note? — 2016-02-28
• Colorado ski town — 2016-01-04
• Resort near Snowmass — 2015-09-17
• Wood used in matchmaking — 2015-05-20
• Poplar variety — 2015-03-04
• Quaking ___ — 2014-11-09
• Popular ski spot — 2014-02-16
• "Quaking" tree — 2012-10-29
• Tree with a namesake ski destination — 2012-05-08
• Colorado ski town — 2012-04-02
• Part of a mountain forest — 2011-12-22
• Colorado resort — 2011-12-06
• Colorado skiing town — 2011-10-24
• Colorado town or tree — 2011-07-18
• Colorado skiing mecca — 2011-03-22
• Colorado resort — 2010-03-28
• Resort on the Roaring Fork River — 2008-12-27
• *Popular rest area — 2008-12-06
• Colorado resort — 2008-10-27
• John Denver wrote two songs about this town — 2008-10-01