Torrey Pines comes about 5 to 7 hours into the ride. The average trained cyclist has enough fuel in his muscles for about 2 hours. This is enough to get you between the first and second food stop. Glycogen is the fuel needed by the muscles.
Preparation begins the week before the ride, with carbo loading and tapering.
Carbo loading is eating a proper diet with an emphasis on carbohydrates. Tapering is gradually tapering your training during the last week, ending with a rest day or very easy ride the day before, so carbohydrates can be stored as muscle glycogen. Gives immediate energy. This is to ensure that it is digested and out of the stomach. Remember that fats take more time to digest and require more oxygen to be converted into usable energy.