What are Brian's long run distances?

Brian mentions several long-run distances throughout his training:

1. If not training for a specific race, he typically runs a 5 or 6-mile loop three times a week.
2. When preparing for marathons, his long runs can increase to up to 20 miles as part of a structured training plan 1.
3. Before past races, he has run long distances of up to 24 miles, incorporating goal marathon pace running into these long runs 2.

Overall, the distances for his long runs vary significantly based on whether he is in a routine maintenance phase or training for a specific marathon.