Green Pass
Peak · 13,409 ft · Eastern Sierra corridor
Green Pass, a 13,409-foot peak in the Eastern Sierra, sits on the drainage divide between the Owens Valley and the High Sierra backcountry. Wind-exposed and rarely crowded.
Exposed ridgeline weather dominates. Wind funnels hard off adjacent peaks in afternoon hours, often climbing to 20+ mph by late day. Morning calm gives way to sustained gusts by midday. Temperature swings sharply with elevation; plan for 20+ degrees colder than the Owens Valley floor.
Over the last 30 days, Green Pass has averaged a NoGo score of 37.0 with an average wind of 12.0 mph and temperature of 22 degrees, though wind has spiked to 45 mph and conditions have ranged from a low of 4.0 to a high of 65.0. The week ahead will test whether spring warming pushes afternoon gusts higher or if settled conditions hold the pass calmer than recent weeks.
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About Green Pass
Green Pass lies on the crest of the Sierra Nevada at 13,409 feet, straddling the watershed between the Owens Valley to the east and the high plateau drainages to the west. Access from the west typically runs via Highway 120 or Highway 395, depending on the approach; the pass itself sits in the upper reaches of the Eastern Sierra corridor, well north of Mammoth Lakes and east of Yosemite's high country. The pass is rarely a primary trailhead destination; most visitors encounter it as a waypoint on longer backpacking routes or mountaineering traverses. Parking and facilities are minimal to nonexistent; approach planning must account for the remoteness and the condition of access roads, which can remain snow-blocked or impassable well into late spring.
Conditions at Green Pass are defined by exposure. The 30-day average wind of 12.0 mph understates the pattern: calm mornings transition to sustained afternoon gusts, often reaching 20 to 30 mph by mid-afternoon and occasionally spiking to 45 mph. The 30-day average temperature of 22 degrees masks extreme variability; overnight lows drop well below zero in winter, and daytime highs rarely exceed freezing even in midsummer at this elevation. Snow persists into July most years; avalanche terrain exists on the surrounding slopes, particularly on the west-facing aspects where wind slab is a winter and spring hazard. Crowding is minimal year-round (average 2.0 on the 7-day rolling scale), making this a true backcountry pass for experienced parties only.
Green Pass suits mountaineers and backpackers planning multi-day traverses or peakbagging objectives in the high Sierra. Solo hikers and day-trippers from nearby towns are rare due to the remoteness and lack of developed infrastructure. The pass is best visited in July and August when snow has consolidated and afternoon wind becomes manageable, though wind can exceed 30 mph even then. Spring ascents (May to June) require avalanche awareness and willingness to cross steep, unstable snow slopes; some years the pass remains snow-bound and impassable until late June or early July. Winter and early spring approaches demand mountaineering experience, specialized equipment, and detailed knowledge of the avalanche terrain. Most visitors plan arrivals for early morning hours to minimize afternoon wind exposure.
Nearby peaks and passes offer similar exposure and remoteness. The Palisade Crest to the south presents comparable avalanche hazards and wind patterns; Mount Whitney, though only 60 miles south, sits in a more developed corridor with better access and higher visitation. Water sources are unreliable near the pass itself; melt from lingering snow patches provides seasonal supply in early summer, but by August the pass zone is dry. Plan to cache or carry water from lower elevations. Winter travel to Green Pass is best attempted during stable weather windows in late winter (February to March) when snowpack has consolidated, avalanche risk is lower, and access roads are more likely to be passable.