Mammoth Mountain
Resort · 8,963 ft · Mammoth Lakes corridor
Mammoth Mountain rises at 8963 feet in California's Sierra Nevada, anchoring the Mammoth Lakes corridor. Spring and early summer deliver the most stable conditions on the peak.
Wind accelerates through the afternoon as lake-effect forcing builds off Mono Lake to the east. Morning hours stay calmer. Late April sees average temperatures near 31 degrees Fahrenheit with average wind of 12 mph; afternoon gusts reach 31 mph regularly. Plan early starts to avoid the wind surge.
The 30-day rolling average wind sits at 12 mph with afternoon peaks to 31 mph; the 30-day NoGo Score averages 45, ranging from 9 to 65. Temperature averages 31 degrees Fahrenheit. The chart below shows the last 30 days plus 7-day forecast for wind, temperature, crowding, and NoGo Score. Watch for afternoon deterioration as the week progresses.
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Today's score by factor
About Mammoth Mountain
Mammoth Mountain straddles the crest of the Sierra Nevada at 8963 feet, roughly 40 minutes south of the town of Mammoth Lakes via Highway 203. The resort sits in a high-elevation transition zone where spring snow lingers into early summer while lower elevations warm rapidly. Access from the west flows through Bishop and Highway 395; from the north, Highway 203 funnels directly from Mammoth Lakes town. The summit exposure means alpine weather dominates; afternoon wind flows off Mono Lake to the east, channeled upslope by the basin topography. High base popularity (0.96 rating) reflects its status as the region's primary ski and outdoor recreation hub.
Conditions at Mammoth Mountain swing sharply by time of day and season. The 30-day average wind of 12 mph masks a diurnal rhythm: mornings sit calmer, afternoons spike toward the 31 mph maximum. Temperature averages 31 degrees Fahrenheit in late April; the annual range spans 17 to 47 degrees, typical for high Sierra terrain. Spring snowpack remains instability prone; the location sits within SAC avalanche bulletin territory. Early season visits (late March through mid-April) encounter heavier snow but stronger wind and larger avalanche hazard. Late April and May offer stable snow, warming days, and predictable afternoon wind. Summer brings dry conditions, afternoon thunderstorms, and peak crowding. Crowding averages 23 across the 30-day window.
Mammoth Mountain suits backcountry skiers, resort operators, and climbers planning high-Sierra approaches. Experienced parties time ascents to morning hours, departing before 10 AM to avoid afternoon wind and exposure. Avalanche terrain is extensive; late April snowpack warrants consultation of the SAC bulletin and careful assessment of slab and wind-slab hazard on north-facing aspects and around ridgelines. Resort visitors should expect full parking lots on weekends when Highway 203 is clear; midweek offers better access and calmer conditions. Climbers approaching peaks in the Ritter Range to the north use Mammoth as a staging ground; they benefit from stable spring conditions after the April wind window closes.
The Mammoth Lakes corridor extends south and east; nearby Inyo Craters and the Owens Valley offer lower-elevation alternatives when Mammoth Mountain conditions deteriorate. June Lake, north via Highway 395, provides similar elevation (8200 feet) with slightly different exposure to Mono Basin wind. For skiers timing a longer stay, the corridor bridges spring touring (Mammoth area) into early-summer rock and water objectives. The SAC avalanche forecast and live wind cameras at the resort summit are essential daily references during March and April.