Moto X

Big Air –- Riders have three attempts to perform their best trick while jumping over an approximate 80-foot gap. The bigger the air and more difficult the trick, the higher the score. Tricks are performed on a 125 cc or 250 cc two-stroke bike.

Step Up -— From a stationary position between 15 and 20 feet away, the rider takes his bike up a 15-foot-plus vertical dirt face and leaps into the air -– attempting to clear a horizontal bar placed between two uprights at the top of the jump.

Freestyle -– Each of the 16 competitors complete two 60-second runs. The best of the two scores is assigned as the competitor’s best score with the top eight advancing to the final round. In the final round, athletes compete in reverse order of the leader board with each completing two 60-second runs. Scoring is based on overall impression, tricks, execution, use of the course and landings.

BMX

Downhill -- After a successful debut at last year’s X Games VII, Downhill BMX returns again this year. Downhill BMX is the only bike racing event and the first official bike racing sport since Mountain Biking was included in 1995. Athletes race downhill traversing 40-foot doubles and enormous step-ups and step-downs.

Dirt –- With most of the dirt jumpers having roots in BMX racing, the sport has evolved since 1995 from a sideshow attraction to a main attraction. Competitors get one jump per round to show the judges the best they have to offer in aerial maneuvers.

Flatland -– Competitors square off in an event that embodies the true spirit of biking through its demand of balance, agility and patience. The riders are judged on style, difficulty, originality, creativity, execution and overall performance. In this highly technical discipline, riders lose points every time they touch the ground.

Park -– Bikers air, flip, spin and grind their way through a park course consisting of spines, quarter-pipes, wedge ramps, handrails and some street- oriented obstacles. Bikers have 90 seconds to impress the judges with the difficulty of their tricks and use of the course.

Vert -– Several of the best bike stunt riders compete in a 12-foot-high, 56-foot-wide half pipe made of wood and surfaced with skatelite (a hard, fast plastic composite). Each rider gets between 45 and 60 seconds to illuminate the air with big air and risky, original tricks.

Skateboard

Park –- 20 professional skaters try to accumulate points by maneuvering over, through and onto obstacles –- grinding on ledges and handrails in a course planned by a world-class designer. Skaters are judged on creativity, amplitude and their ability to use the entire course.

Street -– The 10 best street skaters will compete in a true street competition of natural terrain, in this case Philadelphia’s Love Park. Skaters will grind, ollie onto or over concrete ledges and benches, jump stairs and gaps and boardslide down handrails.

Street Best Trick –- An open jam format that enables skaters to go for their most difficult and impressive tricks on three best trick areas without putting a run together.

Vert –- 20 competitors face a huge 13-foot half pipe constructed of wood, screws and skatelite (a hard, fast plastic composite) and have 45 seconds to put together a run that’s not only judged on amplitude out of the pipe, but also by what kind of technical trick the skater can put together above or on the coping “lip” of the pipe.

Vert Best Trick -– An open jam format that enables skaters to try their most difficult and most spectacular tricks without putting a run together.

Vert Doubles -– Skaters pick their own partners and try to create unique lines together. Runs often include shadowtricks (in unison), over-under airs and opposite airs. Partners get a greater number of points for teamwork.

Aggressive In-Line

Park –- The park competition gathers 25 of the world’s best park skaters and puts them up against ramp-designing veterans. The course is the same for inline skaters and bicycle stunt riders. The course is comprised of ledges, handrails, wedge ramps, quarter pipes, spine ramps and street-oriented obstacles.

Vert -– The vert competition gathers 20 competitors (men and women together) in which each skater performs tricks in the half pipe. The skaters are challenged to link tricks together in a smooth and exciting run. The skaters try to combine big air with big spinning tricks and technical lip tricks.

Speed Climb

Men’s & Women’s speed climb -– Two climbers face off in a head-to-head competition to see who can tag the buzzer at the top of the wall first. Both competitors climb simultaneously on separate, but identical routes.

Wakeboard

Men’s & Women’s -– This event evolved from a combination of surfing and water-skiing. Riders are towed behind a boat while spinning, flipping and twisting off the boat’s wake in addition to using water obstacles to try to score points.

Source: ESPN