I agree with seren nos, start now to get more miles or kms per week and build up the amount of time on your feet. That will make the endurance part so much easier to cover. Although you perhaps love the gym I'd say the treadmill isn't the same as running outdoors.
This could be a Major occasion in your family's life If you choose to go ahead with it.
Good on ya DEot. I've not been to Spurn Point but had an interest in birdwatching many years ago & thought of it. You've really put yourself throught the mill with this challenge. I can only imagine how thrilled your mum would be.
im sure life won't be empty as you have your young son to help make it full, but as you say motivation for the mundane may well be affected. Good Luck to you.
HI Adam. Do you know of the Round Chesterfield Walk route? It passes through Brimington. The section from Brim to Unstone is 6 miles and Brim to Heath is 7 miles. if you get fed up with the out & back routes you could create your own circular route. Perhaps to Brim Common then Tapton & the canal & back to home? Going towards Unstone you're near New Whit then The Handleys & Hundall.
I understand about the sameness of going to Rother Valley CP as I've done that many a time. Maybe turn off for Poolsbrook Country Park, & even Duckmanton & Poolsbrook before heading back on the Trans Pennine Trail.
it won't all be forest paths of course but there several wooded areas in the routes above.