Thread: How much of a difference do hills make for average speed?
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Old 05-25-11 | 04:35 PM
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contango
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Uphill, 1 hour.

Downhill, near enough (4:41.7 to be pedantic)

So total time of 64:40 to do 8.2 miles = 7.605mph

Of course that assumes the speeds you've quoted are actually achieved...
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