12k posted this morning, furthest I've ever ran, and my God did I feel every single kilometre.
Just never felt like I found my stride, and felt like I was constantly just fighting with myself, but hook or by crook, just about got it done.
There's a fairly long (not too steep) incline on the route I used, which plateaus at about 4.5k, but I don't feel like I ever got it back into my legs, even back on the flat, or on the decline coming back out of Marple.
Suppose it's miles in the legs, and I'll go for a 5k tomorrow evening and then have a couple of days rest.