Enduro is a type of mountain biking with a number of downhill sections and transfer stages. It is a stage format event where the winners will have the lowests time from each of the downhill sections. These events take place over a day or couple day period. These events take place all over the world including the USA, Europe, South America, etc.
To follow the Enduro World Series you can check out their website
follow them on Facebook
And watch their videos on YouTube