I believe Ibiza is a great place for a active holiday. The year I spent there, I think I have never been so active (walking mainly) before. So I am happy to guide you to find interesting walking routes in Ibiza and also share this official video promotion on ten sporting events this year in Ibiza.
You can find more information about sporting events in Ibiza here:
The next event, “Isla de Ibiza” Quadtriathlon is on May 3rd:
The “Isla de Ibiza” Quadtriathlon consists of a 1.5k swim, followed by 7k in a canoe, a 40k bike ride and a 10k run. Race categories range from individual to teams of between 2 and 4 people of both sexes.
More info: http://quadriatlonisladeibiza.blogspot.com.es/
Here is the official events promotion (in Spanish)
For walking routes in Ibiza, see my list of places I have gone hiking in Ibiza