Notes
At the Alpharetta Big Creek Greenway with 920xt and doing 8 easy. Adjusted to 310xt distance of 8.31 for the usual 8 mile route. 70F with 65F dew point = TDP of 135 = Heat Adjustment of 1.024, so 10:41 / 1.024 = 10:25 effective pace for my easy run pace of 10:30.