Apart from specific competitions for those with a physical and/or intellectual disability, there is an organisation called the Special Olympics which many people are unaware of. For those of you who have never heard of the Special Olympics, this is the category in sport which deals with people who have a Learning Disability and an IQ of 75 and below. Learning Disability athletes used to be included in the Paralympics but were unfortunately thrown out when a foreign team (not athletics) abused the criteria and was found guilty of cheating.
The good news is that at the London Paralympic Games in 2012, the International Governing Body agreed to allow these track and field athletes to compete in a very small amount of events. The amount of events are increasing and they are classified as T20/F20 athletes.
"Special Olympics, the category in sport which deals with people who have a Learning Disability and an IQ of 75 and below"
Down Syndrome athletes are eligible to compete for the Special Olympics but do also have their own Squads and Championships. There is no fee for applying to join the Special Olympics providing the athlete meets the criteria.