Hash runs are fun runs that are led by a "hare" who, given a ten minute head start, leaves a trail of flour or "hash marks" for the pursuing pack to follow. Some marks are easily found, others are more obscure and require the lead runners to split up and look in several directions. This gives slower runners a chance to catch up. Hash runs often involve unusual areas or terrain. They are not races, but rather social runs that can be enjoyed by the elite racer or casual runner. No great running speed or skill is required. Typical distance is 3-4 miles.