Historical clue formulations

• Where to go for a run — 2026-05-08
• Aspen, for one — 2025-01-19
• Vail or Aspen — 2023-10-10
• Aspen or Alta — 2020-10-04
• Place where you might be asked "Need a lift?" — 2015-12-24
• Chamonix, for one — 2015-06-05
• Vail in the winter, e.g. — 2014-02-03
• Where people travel between poles? — 2006-08-06
• Colorado's Snowmass, e.g. — 2000-03-10