There are different types of trespassing that can deal with a person simply making their way through a property as a form of a shortcut, going onto that land to cause harm or damage to it, or remaining in a land making use of it.
The use of a land for easier travel is not uncommon, but is not one of the most frequently seen in charges for trespass. This can happen with a person that avoids walking around a whole block radius by simply cutting through a parking lot that happens to be private property.
Adults are rarely seen on the end of a trespassing charge, unless of course it is a young one usually between 18-21 years of age. Punishment for an adult trespasser is usually greater than that of a minor, depending on the charge. In California, an infraction trespass charge can result in minimal punishment.
However, a misdemeanor charge for trespassing can result in a prison sentence of up to six months plus additional fines that can be as high as $1,000. If the trespass is at a greater level, one done maliciously and/or causing harm to person or property, the charge can be upgraded to a felony trespass, where jail time may be inevitable and the fines greater.