Junior wanted to have a go at Brimmond Hill, a stiff local climb.
It's one of my lunchtime loops from work.
The off-road navigation is a bit tricksy the first time.
But from home, that would make it Half-Marathon distance, and a hilly one at that, and I doubted my Achilles was up for that.
So I rode to the 4k point, stashed the bike behind a hedge, and ran the remainder with him, out and back as far as the bike.
That cut my run down to a hilly 15k, which was plenty enough for me.