Best training program for late-season goal with lower fitness requirements

I have just come off a 5 month training program training 10-14 hours/week.

I would now like to switch to a training regime of 6 hours/week max to keep myself in shape for an event in September. Obviously I will not be able to keep up the same fitness, but I would like to keep it as high as possible within the given time restrictions.

What would be the best program to choose? It seems that all program options will target a higher fitness than your current one (which is not unreasonable).

Jumping in on this older post because I’ve found that, with time constraints, focusing on quality over quantity can be key. High-intensity interval training (HIIT) or incorporating more intense shorter sessions can help maintain your fitness levels effectively. Have you considered trying a plan that mixes endurance and intensity in shorter workouts?