A 3-hour marathon pace means running at an average speed of 6:52 per mile (4:16 per km) to complete the 26.2-mile (42.2 km) race in exactly 3 hours. This pace requires strong endurance, efficient running form, and disciplined training, often including speed work, tempo runs, and long-distance sessions to maintain consistency over the full distance. https://www.quora.com/profile/Stupid-So/Can-You-Run-a-Sub-3-Marathon-A-Training-Plan-Breakdown-Understanding-the-Sub-3-Marathon-Goal-Running-a-marathon-in-un