
Mud bogging (also known as mud racing, mud running, mud hogging, mud drags, mud dogging, or mudding) is a form of
off-road
Off-roading is the act of driving or riding in a vehicle on unpaved surfaces such as sand, dirt, gravel, riverbeds, mud, snow, rocks, or other natural terrain. Off-roading ranges from casual drives with regular vehicles to competitive events w ...
motorsport
Motorsport or motor sport are sporting events, competitions and related activities that primarily involve the use of Car, automobiles, motorcycles, motorboats and Aircraft, powered aircraft. For each of these vehicle types, the more specific term ...
popular in the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
and
Canada
Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...
in which the goal is to drive a vehicle through a pit of
mud
Mud (, or Middle Dutch) is loam, silt or clay mixed with water. Mud is usually formed after rainfall or near water sources. Ancient mud deposits hardened over geological time to form sedimentary rock such as shale or mudstone (generally cal ...
or a track of a set length. Winners are determined by the distance traveled through the pit. However, if several vehicles are able to travel the entire length, the time taken to traverse the pit will determine the winner. Typically, vehicles competing in mud bogs are
four-wheel drive
A four-wheel drive, also called 4×4 ("four by four") or 4WD, is a two-axled vehicle drivetrain capable of providing torque to all of its wheels simultaneously. It may be full-time or on-demand, and is typically linked via a transfer case pr ...
. The motor sport is overseen by sanctioning bodies like the American Mud Racers Association, and the National Mud Racing Organization (NMRO), that oversee each class, develop and maintain the relationship with track owners to provide a racer and fan-friendly facility, ensure the sponsors get a good return, and help govern the sport.
Vehicles
A modern top level Class V or VI mud racer is a
dragster-style rail design, with a
supercharged
In an internal combustion engine, a supercharger compresses the intake gas, forcing more air into the engine in order to produce more power for a given displacement. It is a form of forced induction that is mechanically powered (usually by ...
engine and/or
nitrous oxide
Nitrous oxide (dinitrogen oxide or dinitrogen monoxide), commonly known as laughing gas, nitrous, or factitious air, among others, is a chemical compound, an Nitrogen oxide, oxide of nitrogen with the Chemical formula, formula . At room te ...
injection. Engines may be in the front or the rear of the vehicles. Vehicles are required to have four wheel drive, in order to assure that the vehicles have the best possibility of avoiding being stuck. The sole difference between Classes V and VI is the tire type. Class V racers have
US Department of Transportation street legal mudding tires for traction. Class VI vehicles have tractor tires.
Early mud boggers were
pickup truck
A pickup truck or pickup is a Truck_classification#Table_of_US_GVWR_classifications, light or medium duty truck that has an enclosed cabin (truck), cabin, and a back end made up of a cargo bed that is enclosed by three low walls with no roof (th ...
s or
sport utility vehicles modified with
lifted suspensions and larger tires, and classes exist for such vehicles today. Engine upgrades were also common. In the late 1970s and early 1980s, large
tractor
A tractor is an engineering vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a Trailer (vehicle), trailer or machinery such as that used in agriculture, mining or constructio ...
tires became popular, and the
drive lines required to run such tires led to some of the first purpose-built mud bogging machines. By the late 1980s, many sanctioning bodies began giving precedence to vehicles with modified, and lower,
dragster-type "rail designs", as they had increased in popularity. At the same time,
superchargers
In an internal combustion engine, a supercharger compresses the intake gas, forcing more air into the engine in order to produce more power for a given displacement. It is a form of forced induction that is mechanically powered (usually by a ...
first became widely used, leading to the modern top-level racer.

In the late 1970s and most 1980s mud bog events, there was generally a class that was for running tractor tired trucks. Trucks like the Arizona Outlaw, Goldbricker, Six Pack, Arizona Sidewinder, Instant Motion, Mud Lord, Mud Pup, Wild Thing,
Grave Digger, Nasty Habits, Unnamed & Untammed, and the legendary Cyclops were frequent competitors. Some of these trucks would later be modified to be
Monster Trucks.
There are many types of mud bogs, from Hill and Hole, Flat or Progressive Track, to Open Bog. They come in many shapes and sizes from to over . Hill and Hole tracks are usually wide long, over a series of hills and holes. All NMRO tracks are Flat or Progressive tracks, more like a drag strip, or sand drag. Open bogs come from Florida and are mostly natural. These tracks have little organization.
Hill and Hole classes range from 4 and 6 Cylinder, Street Stock, Hot Street, Renegade, Super Street, Small Tire Modified 36″ and below, Big Tire Modified 37″ and bigger tire, Unlimited, X Class, and more. There are many classes, usually set by the tire size and engine.
Most Unlimited and X classes are open within the bounds of safety rules. These trucks have big power engines, built just for that class and are not limited to what can be added to the truck. The truck must pass all safety rules and be safe to put in a show and not hurt the crowd.
[ Mud trucks; Retrieved April 27, 2011]
National Mud Racing Organization is currently one of the only major professional championship series left. Their rulebook is the general basis for most other mud racing competitions. The NMRO was founded by Gary Baker of Dayton, Ohio.
USA Motorsports and USHRA ran professional mud racing series, both referred to as the Indoor Series, for many years until it was phased out of events around 1995. They would occasionally have mud bogs as part of later events, but not on the same scale as before.
Years later around 2006 a new era of Mud Bogging started to evolve and has since grown into a worldwide internet sensation. Today, Mud Parks around the eastern half of the United States have events that draw in thousands of people who bring their Atvs, UTVs, buggies, lifted Jeeps, and Mega Trucks to participate in the act of Mud bogging. Most Mega Trucks are built with a custom chassis, have five-ton axles, upwards of 700 horsepower and have tractor tires. Some drivers enter their Mega Truck in freestyle, Hill'n Hole, bounty hole and Tug of War competitions and compete with others for cash and or trophies. Some Mega Trucks have a blower motor or an alcohol injected motor that will bring upwards of 1,500 horsepower. In order to make competitions fair the trucks can be divided into different classes such as Mega Truck Class, 1 Ton class and Super Truck Class.
See also
*
Motorized trail
*
Off roading
*
Swamp buggy
References
External links
* {{commons category inline
Off-roading