In Europe this type of racing was called Motorcycle Cross-country
Baseball is very popular also motocross (motorcycle racing).
not at all
Motorcycle racing is followed by a lot of spectators in tracks and by almost 8,000,000 of persons on television. Famous Italian motorcycle racing manufacturers include: Benelli, MV Agusta, Mondial, Ducati, Aprilia, Beta. Italian motorcycle racer Giacomo Agostini is the all-time leader in victories of motorcycle Grand Prix history and he is considered the best all-time racer by several experts; Valentino Rossi is second in the same all-time ranking of race victories. All kinds of motorcycle racing are popular: superbike racing, Grand Prix motorcycle racing, motocross, supercross, supermoto, enduro, motorcycle trials, motorcycle speedway.
Bike racing games for kids include ATV Quad Bike Racing, Dirt Bike Racing, Street Rally Racing, Motorcycle Racing, BMX Backflips, Mobike 4 and Motocross 2.
Motocross is just 1 form of dirt bike racing. Hairscrambles, hill climb and supermoto are a few examples of other types of dirt bike racing
Motocross, Supercross, Arenacross, Freestyle Motocross, Supermoto
He raced the Supercross series but is not racing the Motocross series for 09.
Motocross is a form of motorcycle racing held on enclosed off-road circuits. The sport evolved from motorcycle trials competitions held in the United Kingdom. Motocross is a physically demanding sport held in all-weather conditions.
Motocross is a form of dirt bike racing that is held on a outdoor track.
One can find information about dirt bike racing on sites such as Motorcycle-USA, The MSF DirtBike School, Motocross Tracks and Dirt Rider. One can also find information in magazines such as Dirt Bike Magazine and Motocross Action Magazine.
I assume by the word "was" you mean when was the first motocross race or when was motocross racing started. It started in Europe in the early 1920's, for the U.S. it come into prominence in the early 1960's.