The deferral window will be is open from 4/15 through 4/April 15 to April 30 of the current race year and only applies to the Full Marathon & Half Marathon.full and half marathon. During this time, you will be able to log into your runsignup may log on to your RunSignup account and defer your entry to the following year.
Complete details and instructions can be found on http://buffalomarathon.org