Iowa Code § 462.1
Liability of possessors and occupants of land to trespassers
1. A possessor of any fee, reversionary, or easement interest in real property, including but not limited to an owner, lessee, or other lawful occupant, owes no duty of care to a trespasser except to refrain from willfully or wantonly injuring the trespasser and to use reasonable care to avoid injuring the trespasser a…