Md. Code, Nat. Res. § 5-1101

(a) In this subtitle the following words have the meanings indicated. (b) (1) “Charge” means price or fee asked for services, entertainment, recreation performed, or products offered for sale on land or in return for invitation or permission to enter or go upon land. (2) “Charge” does not include: (i) The sharing of game, fish, or other products of recreational use; (ii) Benefits to the land arising from the recreational use; or (iii) Contributions in kind or services to promote the management or conservation of resources on the land. (c) “Educational purpose” includes: (1) Nature study; (2) Farm visitations for purposes of learning about the farming operation; (3) Practice judging of livestock, dairy cattle, poultry, other animals, agronomy crops, horticultural crops, or other farm products; (4) Organized visits to farms by school children, 4–H clubs, FFA clubs, and others as part of their educational programs; (5) Organized visits for purposes of participating in or observing historical reenactments as part of an educational or cultural program; and (6) Observation of historical, archaeological, or scientific sites. (d) (1) “Land” means land, roads, paths, trails, water, watercourses, private ways and buildings, structures, and machinery or equipment when attached to realty. (2) “Land” does not include any structure or equipment provided by a unit of local government for the purpose of public recreation. (e) “Off–highway vehicle” or “OHV” means a motor–assisted or motor–driven vehicle that is: (1) Designed for or capable of cross–country travel on or directly over land, snow, or other natural terrain; and (2) Not intended for use on public roads. (f) “Owner” means the owner of any estate or other interest in real property, whether possessory or nonpossessory, including the grantee of an easement. (g) “Recreational purpose” means any recreational pursuit.