Originally Posted by qcanoe
I think @SCRUFFY's question is: "How do you eat and drink differently when you have an extra-ordinary day coming up?"
Yep, It's just a couple big powder days per season when I change my routine. On a typical day I ski 5-6 hours and probably stop for a quick lunch. On a extra-ordinary day, I'll ski straight through for 7-7.5 hours of off-piste powder, then hopefully follow it up with the same the next day!
What I eat before doesn't change much. I just make sure I have a big dinner, normal breakfast, and pre-hydrate with a liter of water while booting up. I'm not as diligent with that on a normal day.
The big change is how I eat and drink during the day. I switch into more of a nutrition/feeding plan similar to an all day ultra-endurance event. For an all-day MTB or similar event my normal plan is 1 liter of water and 300 calories/hour.
Hydrating for skiing all-day I probably drink more like .5 liters of water/hour. I'm not sweating as much as MTBing, and I don't like carrying the weight of that much water in addition to the full avy gear I'm typically carrying. I'll carry a couple smaller bottles of water and refill them with quick stops at drinking fountains during the day. I'll also carry bottle of coke for the sugar and caffeine, and probably a little energy shot for a late day caffeine boost. Yeah, I know I've got a problem.
Nutrition for all-day skiing is the same 300 calories/hour for me. I think you burn a lot of calories keeping warm in addition to your exertion. That means I've got a lot of food in my pack and pockets and I'm eating on almost every lift ride, enough that people think I'm weird... until they have to quit at 2pm and miss a couple hours of powder. A sandwich, cliff bars, power bars, nuts, candy bar... you name it and I'm eating it on the lift. Given your overall lower effort skiing compared to a all-day MTB event, for example, you can pretty much eat anything and not have to worry about intestinal distress. Just make sure you get a good mix of carbs, both complex and sugars, and protein.
I've had some good days this year... but I'm still waiting for that big day!