Runners are NOT permitted to move forward into an earlier wave or corral. While we encourage all runners to line up in the corral to which they are assigned, runners are allowed to move back to a higher corral or wave, with the exception of the first corral of any wave. For example, if you are assigned to Wave One, you may move back to Wave Two, Three, or Four into any corral EXCEPT for the first corral in any wave. Violators are subject to penalties and/or disqualification. Start Boston Marathon Can I start in a different wave/corral than to which I've been assigned for the Boston Marathon?