As long as you can maintain the required pace, you can walk, jog, run, or a combination of those. I'm now thinking the pace might be 16:00 mile, not 16:30 as I mentioned earlier.
When you register, you put in your estimated completion time. They will place you in a starting corral based on that number. The corrals each start about 7 minutes apart, and your official time is based on the electronic tag on your shoe. The sweeper pace is determined based on the last person to cross the start line in the last corral. So 16 minutes after the last person starts, they place the flag at mile marker 1. 32 minutes after the last person starts, they place the flag at mile marker 2. If you cross the mile markers after they've been flagged, you are at risk of being swept from the course by the bus.
If you are not in the last starting corral, you get a few minutes of buffer time since they space the start corrals out by 5 minutes or so. If you google Jeff Galloway, he has a good training program for half marathons.
Thanks for the info! Now, if someone could just convince me I haven't lost my mind!
