Round-trip mileage is calculated using
topographical software and includes the ups and downs of the
terrain. In some cases, I verify these numbers by plotting the route
with a GPS unit during the climb.
In some guidebooks, you may find different mileage numbers for the same route found on 14ers.com. The likely reason for this is that they are calculating mileage using older methods that are less accurate or the mileage is simply an estimate.
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