Yasso 880s are a common marathon-training workout that may roughly predict or calculate the time you can expect to run in your marathon.

The workout involves a series of 880 yard/1/2 Mile repeats. The idea is to work up to 10 repeats shortly before you taper for the race. The repeat time that you’re able to hold for 10 repeats (in minutes and seconds) roughly correlates to the marathon time you can expect to run (in hours and minutes).

For example, if you’re able to run 10 Yasso 880s in four minutes (4:00) each in training, you may be able to finish a marathon distance in approximately four hours (4:00:00).

WORKOUT: One Mile Warm-up through Hillsdale to start of the top of City Park Golf course on Lakeshore.

Run the 880/Half mile at your goal pace.

Jog back 440/1/4 mile with the total recovery minutes the same as your goal pace. **if you ran 4:00 minute half you get a 4:00 minute recovery.

DOTS WILL BE AT EACH QUARTER MILE

Do 10 X 880 which finishes on the peninsula off Stanford.

9 Miles - cool down back to Magpie.

13 miles - finish the loop around City Park Lake and back to Magpie