Luckily, I'm not the first person to try work out what this might look like. The annual Chiltern 100 sportive does just that, offering three different routes. I decided to 'borrow' their Corto Fondo route, modified to start and finish in Berkhamsted.
This provided 54 miles of cycling, with hardly any flat; three and a half hours of going up or down. I took it rather leisurely, but job done - my ride on Strava.
Just four more 50 miles endurance practice rides left now before the big day. A month tomorrow...
