At the end of the summer, we’ve all (hopefully) got a great base and good endurance. Before your last target events of the year, consider throwing a few power workouts into your training. I’d recommend no more than 2 power workouts a week, and be sure to stop power work 10 days before your target event to afford enough recovery and set yourself up for success.
I love doing this on a soccer field/astroturf pitch/golf course (after hours..).
Warm up as needed, jogging easily and running throw some dynamic bounding/light plyometrics.
Do 10 broad jumps, forward, trying to spend as little time as possible on the ground between jumps. Go as far as you can. Then, immediately backpedal back to where you started, keeping your heels off of the ground and your calves loaded the whole time. When you get back to where you started, SPRINT back to where you ended your broad jumps. Go as fast as you can! Spend 60 seconds recovering, and get back to the “starting line” and repeat. I’d start with 8 rounds, and build from there (depending on your base and your target event distance).
Distance running doesn’t have to be slow. Don’t train slow. Train fast.