From Arnie Baker's Bicycling Medicine,

Calories consumed per hour were said to be (0.046 x V x W) + (0.66 x V3), where V=velocity in miles per hour, and W=weight of rider and bike in pounds. 22 additional calories were said to be used per 100 ft of elevation gain for a 176 lb rider and bike. By this formula, a 110-pound woman, riding a 20 lb bike and traveling at 12 mph, would consume about 190 calories per hour. A 150-pound man, riding a 20 lb bike and time trialing at 25 mph, would use about 1,200 calories per hour. These figures are quite approximate. With the same expenditure of energy, aerodynamics and bicycle mechanical efficiency can make a difference of several miles an hour in bicycle speed.

Based on this formula, I would burn 3,700 calories on a 62 mile course with 3,000 ft of climbing and an avg of 15 mph. If it were a completely flat course, calories burned are lowered to approx. 1,360, a lot fewer. I personally think these numbers are a little high but it probably has to do with lean muscle mass (weight to power ratio). Pudge does not burn calories.