Hi thanks for everyone's replies. The route I am thinking of would take in the Angel of the North, Penshaw monument and a tidal path on the river Wear. The key areas are connected via series of old railway lines. I am wanting to pick a distance of around 50k as it makes it runnable in half a day so allows time for travel etc. If there was more interest in Northumberland then I could also pick several great routes there as well.
Alistair love the idea of plumpbumb made me laugh

Also like the FatAss title as well though.
Cragchick I too would like more people to know about some of the fabulous runs in the area. I found most of them on my mountain bike, but now seem to have my running where I can run my old bike routes

I notice the website here as a route facility, I know there a couple of websites that list/promote fatass events as well(but they seem to be very US dominated). We could even create a website ourselves if there is enough interest. Maybe for now use this forum and routes function. We could also maybe use http://www.ultramarathonrunning.com/races/uk.html to list events. But want to be careful not to become too official or we would need insurance/permission to hold event etc!
What are other peoples thoughts on how to gain interest and promote the events themselves.
I will get started on mapping the route I want to run, and track how much interest is generated on this thread in general.