Diavolezza sits entirely above 2,000 metres, with 10 runs and 35 kilometres of piste falling 913 metres from the 3,006-metre summit to a base at 2,093 metres. The split is 12% beginner, 65% intermediate, 20% advanced and 3% expert, so the mountain is pitched at confident skiers rather than first-timers. Two aerial trams, a quad chair, a T-bar and a surface lift handle the uphill work, and around 6 metres of annual snowfall settles on open, treeless slopes with little shelter from the weather. Snow reliability is the main selling point of the high-alpine setting.

The signature descent is the Morteratsch glacier route, an ungroomed run of roughly 10 kilometres that passes beneath Piz Palü and Piz Bernina before finishing at Morteratsch station. Treat it as a guided or well-informed outing. Across at Lagalb, the Minor slope is Graubünden's steepest prepared piste, while La Rösa gives firn-snow freeride towards Val Poschiavo. Learners find little here beyond a small practice area, so Diavolezza rewards advanced skiers and freeriders who want steep, open ground over lift-served variety. The Diavolezza side adds wide cruising runs, and sidecountry lines in Val Arlas reward those with avalanche training.

Diavolezza operates from 18 November 2025 through 3 May 2026 for the 2025-26 season, with Lagalb running a shorter schedule from late December to mid-April. Early-season skiing in October and November typically operates weekends only until continuous operations begin in late December. The extended calendar exploits the glacier's altitude advantage, with skiing possible into late spring when lower resorts have closed. Morteratsch glacier runs remain skiable well into May under most seasonal conditions, though coverage varies annually based on snowfall and temperatures.

The resort's entirely above-2000-metre elevation and north-facing exposure deliver consistent snow quality throughout winter. Annual snowfall averages 6 metres at summit elevations, supplemented by 13.5 kilometres of snowmaking coverage across key runs. Cold temperatures preserve powder for days after storms, particularly on shaded aspects below Piz Palü and in the Val Minor bowl. Base depths at the lower stations typically hold 24-54 centimetres mid-season, whilst upper terrain maintains substantially deeper coverage. Glacier skiing ensures reliable spring conditions when valley resorts struggle with thin bases.

January through March offer peak powder potential, with February delivering the most stable weather windows for off-piste exploration. Early season October-November attracts ski touring enthusiasts and locals chasing first tracks, whilst April-May spring skiing benefits from longer days and softer snow. Midweek visits outside Swiss school holidays guarantee quieter slopes and shorter lift queues. Weather can turn fierce when storms funnel through the Bernina Pass, with wind and low visibility occasionally shutting operations.

Glüna Plaina full moon skiing events run select evenings throughout winter, with illuminated descents from Diavolezza accompanied by on-mountain dining at CHF 45 per ticket. The Diavolezza Challenge ski touring route operates as a timed training course for both beginners and experienced alpinists. No major competitions or festivals anchor the calendar, keeping the focus on pure skiing rather than spectacle. Summer operations remain limited to cable car sightseeing access and alpine hiking rather than glacier skiing.