The Worksop Half marathon on 27th October is a nice one Travs. All on tarmac in and around Clumber Park. Not a PB course as a bit hilly. I did 1:27 in 2017 having only run no further than 8 miles previously!
I'm planning on giving it a go again if it doesn't clash with the one off FRA presentation weekend Fell Race which I hear is being planned .
PS
Just thought Travs that the Buxton Half would be right up your street as there is 1540 feet of ascent. A lovely scenic route. I've not run it but marshaled the race and cycled the route many times.
It was on last Sunday and the winner got around in 1:13:22, 4 mins ahead of 2nd place!