Done-in-a-day routes require planning, efficiency, and fitness. Here are a few tips to make your goal achievable.
When it comes to food selection, keep in mind how the below-freezing temps will affect your food. Choose foods that won't easily freeze, or keep those that might freeze close to your core. Many prefer foods with high fat and protein content. Salami, pre-mixed flavored tuna packets, smoked salmon, bacon, cheese, nuts, gels, Gu packets ›, and bars can all work well in an alpine environment. In addition to high-calorie foods, bring something just for you, a snack that you will want to eat regardless of how you feel. Gummy bears, Belgian waffles, chocolate, candy bars, potato chips, etc. Over time, trail bars and processed foods will lose their appeal. Eat real foods when you can.
Once you start hiking, maintain a consistent pace. Going too fast too soon, can wear you out. Remember, you are pacing yourself to last the entire day. If you can't hold a conversation while hiking, you are probably going too fast.