I feel like this may have been covered previously in a podcast but can’t find the correct one.
On a whim I have decided to enter an event in early August: 300km of ‘gravel’ riding (greenway, canal, former railways and ancient packhorse routes) over 2 days (bivvying over night - can stop at any point along route).
I will likely be averaging about 20km/hour so it is a lot of time in the saddle.
How can I best prepare for this distance on trainer road? I have just started the sweet spot base high volume (late in the day I know) - having previously gone through a base, build, specialty for short distance road racing.
I am concerned that doing 8-10 hours of training per week will not adequately prepare me for such a long ride over a single week end.