For the men it's 12 legs, run in a relay. legs 1,4,7 & 10 are about 5.5 miles, the other 8 legs are of about 3 miles.
For the ladies, it's 6 legs of about 3 miles.
Fastest overall time wins! Top 20 or so teams go through to the National 12/6 stage road relays in about a months time I think it is.
The closing date for online entries is 20th March