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Mmm, Colorado, canyons... beautiful! Saw your photos, great place to visit!
I can also get altitude sickness at an altitude of 3000+ m, but it’s also not very strong. Since we were by car, and the highest places, as a rule, are passes where we didn’t stay for long, everything went well.

I completely understand you, a wallet is a delicate, finite thing, sometimes we have to take care of it :))