Originally Posted by
The_Cretin
Oh, if it were only that simple...
It is. Get a powermeter, train so you can crank out like 250 watts steadily for 2 hours on flats, and you'll be able to crank them out on hills so long as they're not insanely steep requiring like 300 watts just to stay up. For longer distances, you'll have to hold that wattage longer.