Base Jumping: Base jumping is considered one of the worlds most deadly sports with a high overall fatality rating due to the nature of the sport, free falling from high altitudes with a large tarp strapped to your back. The sport is fairly simple over all with the main objective being to land safely however due to the low altitude there is no time to deal with problems. From jump to pulling the shoot the jumper has anywhere from 3-10 seconds depending on the height of the base. The most popular jumping places that will find are tall buildings, antennas, spans, bridges and cliffs. Since the fatality rate is so high the sport has been outlawed in many states, but that doesn’t stop most people.
Fatalities: 1/60 people
Rallying: Rallying, also known more popularly as rally car racing, is an extremely fast paced, outdoor version of auto racing. The tracks are generally on private/public roads typically made of dirt, gravel and paved sections. The cars driven by the racers are technically street-legal cars but highly modified and faster than any stock counterpart. The races operate with teams of two, a navigator and a driver: navigator has a detailed custom made map that shows individual dips, slopes, sand, hard spots, etc.
Worst Crash: Killed 80 spectators plus the drive, 100 more injured.
Free Climb/ Free Solo: Free hand rock climbing is the most dangerouskind of rock climbing with no room for error. It involves the use of only your body to propel yourself up the rocky slope and maintain position. The reason for the level of danger is due to the lack of rope and equipment, meaning virtually none so a fall usually results in serious injury or death.
upon a fall.
Average Deaths: 113/year or 1/27,000 climbs
Big Wave Surfing: Big Wave Surfing Big wave surfing is a sport designed for the adrenalin junky. Far more dangerous thanregular surfing, the waves for big wave surfing range from at least 20ft. and up, on the back of the wave. Due to the size and speed of the waves surfers could no longer paddle straight in, they have to be pulled into position in an art known as Tow Surfing. The massive size and force of the wave can cause serious injury or death, pushing the surfer any where from10-50 feet below the surface. The biggest risk of wiping out on a big wave is the possibility of being stuck under by multiple consecutive waves or being slammed into a reef.
Surfing (regular) Deaths: Estimated 200/year
Super-bike Racing: Super-bike racing is a more advanced form of regular motorcycle racing and the bikes are highly modified and tuned by the manufacture. The sport demands speed and agility and because of the demands the risks go up, in some courses the ridersreach speeds of up to 190mph. Although the riders wear very effective padding that could count as a suite of armor the speeds of their crashing impacts can only be absorbed so well.
Track Death Toll: Isle of Man track has claimed over 200 super-bike racers.

http://www.interestingstories.net/top-5-deadliest-sports-of-2011/