Diaz Pass
Peak · 13,261 ft · Eastern Sierra corridor
Diaz Pass is a 13,261-foot alpine crossing in the Eastern Sierra, accessed from the Inyo County side. A high-elevation funnel prone to afternoon wind and early-season snow.
Wind accelerates through the pass by mid-afternoon, especially on clear days when thermal gradients peak. Morning hours are calmer. Snow lingers into early summer; cornices form on ridges above 13,000 feet. Exposure is full; there is no shelter once you are on the crest.
Over the last 30 days, Diaz Pass has averaged a NoGo Score of 37.0 with a mean wind of 15.0 mph and temperatures around 21 degrees Fahrenheit. Gusts have reached 42 mph during afternoon warming cycles. The week ahead follows seasonal melt patterns; expect stable mornings and increasing wind by mid-day as solar heating intensifies.
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About Diaz Pass
Diaz Pass sits on the crest of the Eastern Sierra at 13,261 feet, straddling the boundary between Inyo and Tulare counties. The pass is accessed from the Inyo side via a high-elevation approach that gains significant elevation through talus and snow fields. The nearest roadhead is reached from US Highway 395 south of Independence, typically a 2.5 to 3-hour drive from the valley floor. Winter and early spring access is often blocked by snow; the standard approach window runs from late spring through early autumn. The pass itself is remote, with minimal infrastructure and no maintained trail or shelter.
Weather at Diaz Pass is dominated by afternoon wind funneling off the Sierra crest. The 30-day average wind stands at 15.0 mph, but gusts routinely exceed 30 mph in the afternoon, with a 30-day maximum of 42 mph recorded during high-pressure systems. Temperatures average 21 degrees Fahrenheit over the last month, typical of high-Sierra winter and spring conditions. Crowding is minimal (2.0 average) because access is technical and the approach takes most of a day. Spring brings rapid snowpack evolution and avalanche hazard on steeper flanks. Summer offers the most stable window, though afternoon winds persist year-round.
Diaz Pass is best suited for experienced mountaineers with winter travel skills and avalanche awareness. The approach crosses avalanche terrain; cornices form along the ridge crest and are unstable after solar heating. Solo travel is uncommon and not recommended. Parties should depart early to avoid afternoon wind and complete the crossing before 2 p.m. if possible. Carry a full winter kit even in summer; temperature swings of 20+ degrees between sun and shade are normal. The pass is not a casual walk; it demands route-finding ability, self-rescue capability, and respect for exposure.
Nearby alternatives include New Army Pass (12,300 feet) to the south and Forester Pass (13,180 feet) on the High Sierra Trail to the north. New Army Pass offers similar elevation and wind exposure but is slightly lower and may clear earlier in spring. Forester Pass is equally exposed and often sees more traffic from PCT through-hikers. All three passes funnel wind and require morning starts and avalanche-aware route-finding. The Eastern Sierra corridor overall is characterized by rapid temperature swings, afternoon wind, and complex snowpack; Diaz Pass is one of the highest and most exposed crossings in this region.