average speed for boston marathon
Â· just now. Report Abuse. The record time for the Boston Marathon is 2 hours, 7 minutes, and 14 seconds. Over 26.2 miles, that's an average of about a 4 minute, 48 second mile, or about 12 mph I hope this helps take care.Source(s): 10k Newham London Run Be a part of it on 7th March 2010.Sign up now. www.NewhamLondonRun.org.he record time for the Boston Marathon is 2 hours, 7 minutes, and 14 seconds. Over 26.2 miles, that's an average of about a 4 minute, 48 second mile, or about 12 mph I hope this helps take care. Source(s): 10k Newham London Run Be a part of it on 7th March 2010. Sign up now. www.NewhamLondonRun.org.