Sub-4:20 Marathon Pace Chart (Miles / Km)
To run a 4:20 hour marathon you need to run at a pace of 9:55 per mile or 6:10 per kilometer. Following the splits below (and shaving off a second), you’ll run a sub 4:20 marathon. I’d recommend aiming to run 1-2 minutes ahead of the split target time from 10 miles, as you’ll likely […]