Time on the bike counts, regardless of bike – so I shoved myself and my hard tail mountain bike up the South Downs Way. The result was quite a bit of walking: not because of the gradient (a 34-42 bottom gear will go up almost anything) but because a millennia or two of water cascading downwards was carved deep ruts into the path and it’s basically impossible to ride up (for me, at any rate).
So I pushed the bike up, and then cycled down and looped around back. Just under 17 miles at no particular speed but with a lot of exertion. It all counts.