This piste is just a link from the top of the Rio to Rebeco.
You can use it if you see that this part of el Rio is very crowded, as you will end up in the base of Stadium either way.
You can also use it if you don't feel very comfortable with the steepness of the el Rio slope.
If you find it very difficult here then take the Stadium lift back to the Borreguiles area as el Rio is a very long piste and it gets more difficult later. Sometimes you can find patches of ice.