The route from Corvara to Arabba is part of the clockwise route around the Sella Ronda. The quickest and easiest way - which is described on this page - can also be extended somewhat by taking advantage of some of the interesting runs on the eastern side of the Passo Campolongo if time is not a factor.
The single route out of Corvara is via the Boè gondola which rises to 2000m in altitude. From here there is a lengthy red back down to the village or the option of taking an easyish but sometimes crowded black run from the top of the Vallon chairlift.
Those heading directly for Arabba will want to take the red run directly down to Passo Campolongo. From the tiny settlement on the road there is a choice of heading up into the extensive ski area on the other side via one of the Cherz chairlifts, or of taking the link through to the Bec de Roces on the Campolongo chairlift (a Dolomiti Superski pass is necessary to use this lift as it is part of the neighbouring Arabba area).