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32,808 152/381-ft. footrace, 4 letters
About 1/4 of a marathon, 4 letters
Certain race, informally, 4 letters
Certain race... or a cryptic title to this puzzle, 4 letters
Charity event, often, 4 letters
Common charity event, 4 letters
Common race distance, 4 letters
Common road race type, 4 letters
Cross-country distance, 4 letters
Endurance race, for short, 4 letters
Long footrace, for short, 4 letters
Long race, for short, 4 letters
Marathon prep, maybe, 4 letters
Marathoner's practice, 4 letters
Medium-distance race, 4 letters
Medium-distance run, 4 letters
Medium-distance run, for short, 4 letters
Metric mini-marathon, 4 letters
Piece of cake for a marathoner, 4 letters
Popular charitable event, informally, 4 letters
Race distance, informally, 4 letters
Race much shorter than a marathon, 4 letters
Race of a little over 6 mi., 4 letters
Race of about 6.2 mi., 4 letters
Race of about six miles, 4 letters
Race that's a little more than six miles long, 4 letters
Race that's about 6.2 miles long, 4 letters
Race that's about a quarter of a marathon, 4 letters
The world record for it is a little more than 26 minutes, 4 letters
Warm-up for a marathon, 4 letters
Typist's setup usually performed with the right hand, 6 letters