Pay close attention to your surroundings once you enter Magic kingdom. This is a high collision area as other runners will stop dead in front of you to take pictures or cut you off to meet family on main street. I pulled muscles avoiding a collision one year because a inconsiderate self-centered jerk cut directly in front of me, and slowed almost for a stop in ordered to get his picture taken by the photopass people, right before the castle. That park has the worst congestion, so watch out. And in general some people think the photographers are there just for them...use caution when you see their green sheds
AGREED!
Two years ago running down Main Street a woman stopped dead in front of me and turned around to take a selfie.
I incidently got to second base as I was trying to avoid a collision.
My compliments to that sports-bra. I would love to see how that selfie turned out?
Rookies need to know that AFTER you exit Cinderella's Castle,
move to your left and Disney has photographers or you can take your own photos under the castle out of the way of runners.
(They also have photographers as you storm out of the castle, so smile.)
If you must stop on Main Street to see someone, etc, move to the far right.
The left side is traffic and watch out for the trolley tracks.
This year the course has changed and we actually get to run through the MK entry gates which mean a longer run down Main Street!
Regarding World Showcase spectating, some years it has been opened by the time I pass through, others it has only been runners.
They have people roped off in UK as you pass from backstage pretty much every year though.
If WS opens at 10:00 then it will likely be open for a lot of runners but not all.
Perhaps a benefit or curse of starting in a later corral.