Keep in mind that some of us could cover half our states and never hit 5,000' of climbing, so not everyone doing centuries is doing that much climbing.
Also, some of the routes around here DO have lots of climbing, but it's lots of little hills, not one huge mountain pass. As far as I know, it's a lot easier to do 100 hills 50' high than one 5,000' climb. So don't assume that everyone doing 5,000' is doing what you are.
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"be careful this rando stuff is addictive and dan's the 'pusher'."