The paved bike path descending Vail Pass

Keystone 101

9,400 feet: what the altitude actually does to you

20 November 2025 · 5 min read · By Mountain View Sports

About two thirds of the oxygen you get at sea level. What that means for your first day, your sleep, and the one drink that feels like three.

Article in progress. The full post is still being written — call the shop on (970) 468-0396 for the answer in the meantime.

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