13k stands for 13 kilometers. To convert kilometers to miles, you can use the conversion factor where 1 kilometer is approximately equal to 0.621371 miles.
So, to find out how many miles 13 kilometers is, you multiply 13 by 0.621371:
13 km × 0.621371 = 8.077823 miles
Therefore, 13 kilometers is approximately 8.08 miles.