Backcountry ski run (advanced)45.7986° N, 6.6794° EAdvanced
Grevettaz
Grevettaz is a mogul descent at Les Contamines: a March 2015 firsthand snowboard account describes the run as ungroomed and bumped from end to end. The same account records a demanding drag-lift return, an important part of that outing rather than a smooth ride back to the main pistes.
References
Dan-o / J2Ski original snowboarder account
St Gervais and surrounds — trip report 8–13 March