Morning all. Odd Garmin experience this morning - was getting strange readings on my run that suggested I was going absurdly fast, then at the end had a substantial overrun on a route I do regularly. Downloaded data and it had my start point about a mile away from where I actually started. Never had this before. I'll do a hard reset, but just wondered if anyone else had had this problem? It's a 310xt.
Looked at the website and that's quite a challenge - good luck. Can't advise much on the training other than practice a lot on hills, and maybe try out a walk/run strategy to see what intervals suit you. But my main tip would be to take midge repellent, and lots of it.
Natty - I'd use the 10k time, plug it into something like the McMillan calculator and see what you get. But that might be a bit easy, because you've done a lot of running since May, so if you're not pretty knackered by the end, consider upping the pace a bit .