There are so many variables that you will have trouble getting anything "exact" for your circumstances. I have read in many journals ect. that 6000 calories is a standard burn for a full day in the mountains. That seems accurate when compared to the stairstepper monitor that puts the burn at about 950/hr for me. Variables to include would be temp, elevation, oxygen consumption (it takes oxygen to burn calories.), Weight moved, amount and type of calories consumed. On top of that, figure in the recovery and build time after the exercise, again coupled with oxygen comsumption, type and quantity of calorie intake, fat burning/muscle building. You would need Catbird to figure this one out.