Here is a list of the team rosters.
http://www.greatrun.org/news-and-media/news/cats/simplyhealth-great-edinburgh-xcountry/50
The meet starts at 13:15 (8:15 am ET ). Here is the schedule.
13:23 Simplyhealth Great Edinburgh XCountry 4 x 1k Relay* 4 x 1k
13:55 Simplyhealth Great Edinburgh XCountry Women's 6k* 6k
14:35 Simplyhealth Great Edinburgh XCountry Men's 8k* 8k
15:15 BBC coverage finishes
The meet is on in the US on USATV.+ which has a subscription fee.
For those of you with UK IPs, it's free as it's on BBC One.