Yeah, I was in Leadville, CO last summer and there was at least one there. FYI, Leadville is the town with the highest elevation in the continental US - 10,200 feet. Not sure if there is a town in AK with a higher elevation. I don't see the point though - although you might think it would be a good idea to have an O2 bar at a high elevation, wouldn't it make the post-inhalation experience that much worse? I didn't find it particularly fatiguing to exercise around 10,000 feet, but I did hike up to over 12,000, and once I got that far I started getting seriously winded. But a ten mile bike ride at 10,000 or so was really not much different from a ten mile bike ride here in Minnesota at < 1,000 feet.
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