I rode The Jake with MapMyRide+! Distance: 16.25mi, time: 01:23:20, pace: 5:08min/mi, speed: 11.70mi/h.
http://mapmyride.com/workout/1148282977
I have a pair of summer cyclocross tyres on order. They have a faster rolling file surface in the middle, and blocks at the sides.

However, the towpaths are soft again and quite muddy in parts. It’s seems that I don’t need these tyres this year.
The latest news in cycling is Gravel Bikes. They are like ‘cross bikes but for different geometry. The also make excellent commuting machines, most come with eyelets for guards and rack.
Gravel racing isn’t going to take off here, it’s not dry enough.