There will be a wide range of distances depending on your race goals, and the time of year you begin training. Send me a race schedule if you know the events you plan on doing. Don't go any further than you've gone in the past 6 weeks. If you are on an Ironman or half Ironman plan, let me know your longest run and longest bike ride within the past month. I often prescribe a running emphasis with road races in the Fall.
Winter is good for a swim emphasis for most people.
We move into a bike phase in February and March. In April and May, we are in a balanced phase, building a combined performance level. In many cases, during the race season, there will be aditional shorter rotations. This depends on your individual strengths and weaknesses. These rotations will differ with individuals and time of year beginning training.